Analysis of interatomic Contacts of Structural Units in PDB entry:
4A2M

Contacts of Structural Units (CSU) are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332).
This page provides analyses of contacts formed by:

chains
helices
sheets
residues

For analysis of ligand-protein contacts, use:

LPC software

3D structure can be seen in additional window with STING software for 4A2M entry

There are 2 chains in PDB entry 4A2M (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	GLN 28	ILE 783
B	GLN 28	ASP 571

There are 19 helices in PDB entry 4A2M. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	35	39	Right-handed 310
Helix 2	2	A	168	173	Right-handed alpha
Helix 3	3	A	538	543	Right-handed 310
Helix 4	4	A	578	582	Right-handed 310
Helix 5	5	A	621	625	Right-handed 310
Helix 6	6	B	35	39	Right-handed 310
Helix 7	7	B	168	173	Right-handed alpha
Helix 8	8	B	538	543	Right-handed 310
Helix 9	9	B	578	582	Right-handed 310
Helix 10	10	B	621	625	Right-handed 310
Helix 11	11	C	35	39	Right-handed 310
Helix 12	12	C	168	173	Right-handed alpha
Helix 13	13	C	538	543	Right-handed 310
Helix 14	14	C	621	625	Right-handed 310
Helix 15	15	D	35	39	Right-handed 310
Helix 16	16	D	168	173	Right-handed alpha
Helix 17	17	D	538	543	Right-handed 310
Helix 18	18	D	578	582	Right-handed 310
Helix 19	19	D	621	625	Right-handed 310

There are 68 sheets in PDB entry 4A2M. Click on sheet of interest to get list of strands forming it: AA, AB, AC, AD, AE, AF, AG, AH, AI, AJ, AK, AL, AM, AN, AO, AP, AQ, BA, BB, BC, BD, BE, BF, BG, BH, BI, BJ, BK, BL, BM, BN, BO, BP, BQ, CA, CB, CC, CD, CE, CF, CG, CH, CI, CJ, CK, CL, CM, CN, CO, CP, CQ, A, DB, C, DD, DE, DF, G, DH, DI, DJ, DK, DL, DM, DN, DO, DP, DQ,

There are 4 strands in AA sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	32	34	first strand
Strand 2	A	332	335	anti-parallel
Strand 3	A	323	327	anti-parallel
Strand 4	A	312	317	anti-parallel

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There are 4 strands in AB sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	45	50	first strand
Strand 2	A	56	60	anti-parallel
Strand 3	A	64	67	anti-parallel
Strand 4	A	72	75	anti-parallel

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There are 4 strands in AC sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	90	95	first strand
Strand 2	A	101	105	anti-parallel
Strand 3	A	108	113	anti-parallel
Strand 4	A	118	122	anti-parallel

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There are 2 strands in AD sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	125	126	first strand
Strand 2	A	129	130	anti-parallel

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There are 4 strands in AE sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	135	140	first strand
Strand 2	A	143	148	anti-parallel
Strand 3	A	151	156	anti-parallel
Strand 4	A	161	163	anti-parallel

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There are 4 strands in AF sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	176	182	first strand
Strand 2	A	185	190	anti-parallel
Strand 3	A	195	199	anti-parallel
Strand 4	A	205	207	anti-parallel

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There are 4 strands in AG sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	217	224	first strand
Strand 2	A	227	232	anti-parallel
Strand 3	A	237	241	anti-parallel
Strand 4	A	246	250	anti-parallel

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There are 4 strands in AH sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	265	270	first strand
Strand 2	A	276	280	anti-parallel
Strand 3	A	284	287	anti-parallel
Strand 4	A	294	297	anti-parallel

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There are 4 strands in AI sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	343	345	first strand
Strand 2	A	652	655	anti-parallel
Strand 3	A	644	648	anti-parallel
Strand 4	A	631	638	anti-parallel

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There are 4 strands in AJ sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	359	364	first strand
Strand 2	A	370	374	anti-parallel
Strand 3	A	379	382	anti-parallel
Strand 4	A	389	392	anti-parallel

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There are 4 strands in AK sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	408	414	first strand
Strand 2	A	419	424	anti-parallel
Strand 3	A	428	433	anti-parallel
Strand 4	A	439	442	anti-parallel

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There are 4 strands in AL sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	454	459	first strand
Strand 2	A	465	469	anti-parallel
Strand 3	A	473	477	anti-parallel
Strand 4	A	482	485	anti-parallel

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There are 4 strands in AM sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	500	505	first strand
Strand 2	A	511	515	anti-parallel
Strand 3	A	519	525	anti-parallel
Strand 4	A	528	531	anti-parallel

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There are 4 strands in AN sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	545	550	first strand
Strand 2	A	556	560	anti-parallel
Strand 3	A	563	568	anti-parallel
Strand 4	A	573	577	anti-parallel

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There are 4 strands in AO sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	590	593	first strand
Strand 2	A	599	603	anti-parallel
Strand 3	A	606	611	anti-parallel
Strand 4	A	616	620	anti-parallel

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There are 4 strands in AP sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	679	680	first strand
Strand 2	A	669	676	anti-parallel
Strand 3	A	709	715	anti-parallel
Strand 4	A	745	748	anti-parallel

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There are 5 strands in AQ sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	699	702	first strand
Strand 2	A	774	780	parallel
Strand 3	A	754	763	anti-parallel
Strand 4	A	725	731	anti-parallel
Strand 5	A	738	740	anti-parallel

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There are 4 strands in BA sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	32	34	first strand
Strand 2	B	332	335	anti-parallel
Strand 3	B	323	327	anti-parallel
Strand 4	B	312	317	anti-parallel

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There are 4 strands in BB sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	45	50	first strand
Strand 2	B	56	60	anti-parallel
Strand 3	B	64	67	anti-parallel
Strand 4	B	72	75	anti-parallel

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There are 4 strands in BC sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	90	95	first strand
Strand 2	B	101	105	anti-parallel
Strand 3	B	109	113	anti-parallel
Strand 4	B	118	122	anti-parallel

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There are 2 strands in BD sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	125	126	first strand
Strand 2	B	129	130	anti-parallel

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There are 4 strands in BE sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	135	140	first strand
Strand 2	B	143	147	anti-parallel
Strand 3	B	152	156	anti-parallel
Strand 4	B	161	163	anti-parallel

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There are 4 strands in BF sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	176	182	first strand
Strand 2	B	185	190	anti-parallel
Strand 3	B	195	199	anti-parallel
Strand 4	B	205	207	anti-parallel

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There are 4 strands in BG sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	217	224	first strand
Strand 2	B	227	232	anti-parallel
Strand 3	B	237	240	anti-parallel
Strand 4	B	247	250	anti-parallel

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There are 4 strands in BH sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	265	270	first strand
Strand 2	B	276	280	anti-parallel
Strand 3	B	284	287	anti-parallel
Strand 4	B	294	297	anti-parallel

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There are 4 strands in BI sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	343	345	first strand
Strand 2	B	652	655	anti-parallel
Strand 3	B	644	648	anti-parallel
Strand 4	B	631	638	anti-parallel

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There are 4 strands in BJ sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	359	364	first strand
Strand 2	B	370	374	anti-parallel
Strand 3	B	379	382	anti-parallel
Strand 4	B	389	392	anti-parallel

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There are 4 strands in BK sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	408	414	first strand
Strand 2	B	419	424	anti-parallel
Strand 3	B	428	433	anti-parallel
Strand 4	B	439	442	anti-parallel

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There are 4 strands in BL sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	454	459	first strand
Strand 2	B	465	469	anti-parallel
Strand 3	B	473	477	anti-parallel
Strand 4	B	482	486	anti-parallel

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There are 4 strands in BM sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	502	505	first strand
Strand 2	B	511	514	anti-parallel
Strand 3	B	519	525	anti-parallel
Strand 4	B	528	531	anti-parallel

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There are 4 strands in BN sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	545	550	first strand
Strand 2	B	556	560	anti-parallel
Strand 3	B	563	568	anti-parallel
Strand 4	B	573	577	anti-parallel

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There are 4 strands in BO sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	590	593	first strand
Strand 2	B	599	602	anti-parallel
Strand 3	B	607	611	anti-parallel
Strand 4	B	616	620	anti-parallel

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There are 4 strands in BP sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	679	680	first strand
Strand 2	B	669	676	anti-parallel
Strand 3	B	709	715	anti-parallel
Strand 4	B	745	748	anti-parallel

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There are 5 strands in BQ sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	699	702	first strand
Strand 2	B	774	780	parallel
Strand 3	B	754	763	anti-parallel
Strand 4	B	725	731	anti-parallel
Strand 5	B	738	740	anti-parallel

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There are 4 strands in CA sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	32	34	first strand
Strand 2	C	332	335	anti-parallel
Strand 3	C	323	327	anti-parallel
Strand 4	C	312	317	anti-parallel

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There are 4 strands in CB sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	45	50	first strand
Strand 2	C	56	60	anti-parallel
Strand 3	C	64	67	anti-parallel
Strand 4	C	72	75	anti-parallel

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There are 4 strands in CC sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	90	95	first strand
Strand 2	C	101	105	anti-parallel
Strand 3	C	109	113	anti-parallel
Strand 4	C	118	122	anti-parallel

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There are 2 strands in CD sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	125	126	first strand
Strand 2	C	129	130	anti-parallel

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There are 4 strands in CE sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	135	138	first strand
Strand 2	C	143	148	anti-parallel
Strand 3	C	151	156	anti-parallel
Strand 4	C	161	163	anti-parallel

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There are 4 strands in CF sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	176	182	first strand
Strand 2	C	185	190	anti-parallel
Strand 3	C	195	199	anti-parallel
Strand 4	C	205	207	anti-parallel

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There are 4 strands in CG sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	217	224	first strand
Strand 2	C	227	232	anti-parallel
Strand 3	C	237	241	anti-parallel
Strand 4	C	246	250	anti-parallel

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There are 4 strands in CH sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	265	270	first strand
Strand 2	C	276	280	anti-parallel
Strand 3	C	284	287	anti-parallel
Strand 4	C	294	297	anti-parallel

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There are 4 strands in CI sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	343	345	first strand
Strand 2	C	652	655	anti-parallel
Strand 3	C	644	648	anti-parallel
Strand 4	C	631	638	anti-parallel

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There are 4 strands in CJ sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	359	364	first strand
Strand 2	C	370	374	anti-parallel
Strand 3	C	379	382	anti-parallel
Strand 4	C	389	392	anti-parallel

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There are 4 strands in CK sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	408	414	first strand
Strand 2	C	419	424	anti-parallel
Strand 3	C	428	433	anti-parallel
Strand 4	C	439	442	anti-parallel

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There are 4 strands in CL sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	454	459	first strand
Strand 2	C	465	469	anti-parallel
Strand 3	C	473	477	anti-parallel
Strand 4	C	482	486	anti-parallel

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There are 4 strands in CM sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	502	505	first strand
Strand 2	C	511	514	anti-parallel
Strand 3	C	519	525	anti-parallel
Strand 4	C	528	531	anti-parallel

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There are 4 strands in CN sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	545	550	first strand
Strand 2	C	556	560	anti-parallel
Strand 3	C	563	568	anti-parallel
Strand 4	C	573	577	anti-parallel

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There are 4 strands in CO sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	590	593	first strand
Strand 2	C	599	603	anti-parallel
Strand 3	C	606	611	anti-parallel
Strand 4	C	616	620	anti-parallel

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There are 4 strands in CP sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	679	680	first strand
Strand 2	C	669	676	anti-parallel
Strand 3	C	709	715	anti-parallel
Strand 4	C	745	748	anti-parallel

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There are 5 strands in CQ sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	699	702	first strand
Strand 2	C	774	780	parallel
Strand 3	C	754	763	anti-parallel
Strand 4	C	725	731	anti-parallel
Strand 5	C	738	740	anti-parallel

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There are 4 strands in A sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	32	34	first strand
Strand 2	D	332	335	anti-parallel
Strand 3	D	323	327	anti-parallel
Strand 4	D	312	317	anti-parallel

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There are 4 strands in DB sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	45	50	first strand
Strand 2	D	56	60	anti-parallel
Strand 3	D	64	67	anti-parallel
Strand 4	D	72	75	anti-parallel

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There are 4 strands in C sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	90	95	first strand
Strand 2	D	101	105	anti-parallel
Strand 3	D	109	113	anti-parallel
Strand 4	D	118	122	anti-parallel

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There are 2 strands in DD sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	125	126	first strand
Strand 2	D	129	130	anti-parallel

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There are 4 strands in DE sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	135	140	first strand
Strand 2	D	143	147	anti-parallel
Strand 3	D	152	156	anti-parallel
Strand 4	D	161	163	anti-parallel

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There are 4 strands in DF sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	176	182	first strand
Strand 2	D	185	190	anti-parallel
Strand 3	D	195	199	anti-parallel
Strand 4	D	205	207	anti-parallel

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There are 4 strands in G sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	217	224	first strand
Strand 2	D	227	232	anti-parallel
Strand 3	D	237	241	anti-parallel
Strand 4	D	246	250	anti-parallel

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There are 4 strands in DH sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	265	270	first strand
Strand 2	D	276	280	anti-parallel
Strand 3	D	284	287	anti-parallel
Strand 4	D	294	297	anti-parallel

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There are 4 strands in DI sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	343	345	first strand
Strand 2	D	652	655	anti-parallel
Strand 3	D	644	648	anti-parallel
Strand 4	D	631	638	anti-parallel

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There are 4 strands in DJ sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	359	364	first strand
Strand 2	D	370	374	anti-parallel
Strand 3	D	379	382	anti-parallel
Strand 4	D	389	392	anti-parallel

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There are 4 strands in DK sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	408	414	first strand
Strand 2	D	419	424	anti-parallel
Strand 3	D	428	433	anti-parallel
Strand 4	D	439	442	anti-parallel

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There are 4 strands in DL sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	454	459	first strand
Strand 2	D	465	469	anti-parallel
Strand 3	D	473	477	anti-parallel
Strand 4	D	482	485	anti-parallel

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There are 4 strands in DM sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	502	505	first strand
Strand 2	D	511	514	anti-parallel
Strand 3	D	519	525	anti-parallel
Strand 4	D	528	531	anti-parallel

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There are 4 strands in DN sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	545	550	first strand
Strand 2	D	556	560	anti-parallel
Strand 3	D	563	568	anti-parallel
Strand 4	D	573	577	anti-parallel

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There are 4 strands in DO sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	590	593	first strand
Strand 2	D	599	603	anti-parallel
Strand 3	D	606	611	anti-parallel
Strand 4	D	616	620	anti-parallel

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There are 4 strands in DP sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	679	680	first strand
Strand 2	D	669	676	anti-parallel
Strand 3	D	709	715	anti-parallel
Strand 4	D	745	748	anti-parallel

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There are 5 strands in DQ sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	699	702	first strand
Strand 2	D	774	780	parallel
Strand 3	D	754	763	anti-parallel
Strand 4	D	725	731	anti-parallel
Strand 5	D	738	740	anti-parallel

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Analysis of interatomic Contacts of Structural Units in PDB entry: 4A2M

Analysis of interatomic Contacts of Structural Units in PDB entry:
4A2M