Analysis of interatomic Contacts of Structural Units in PDB entry:
21BO

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 21BO entry

There are 9 chains in PDB entry 21BO (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
B	ASP 1	CYS 214
C	ASP 1	GLU 500
D	ASP 1	GLU 500
H	GLN 1	CYS 232
I	ASP 1	GLU 500
K	ASP 1	CYS 214
L	ASP 1	CYS 214
A	GLN 1	CYS 232
G	GLN 1	CYS 232

There are 50 helices in PDB entry 21BO. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	AA1	B	79	83	Right-handed 310
Helix 2	AA2	B	121	127	Right-handed alpha
Helix 3	AA3	B	183	188	Right-handed alpha
Helix 4	AA4	C	56	63	Right-handed alpha
Helix 5	AA5	C	64	68	Right-handed 310
Helix 6	AA6	C	97	106	Right-handed alpha
Helix 7	AA7	C	118	122	Right-handed 310
Helix 8	AA8	C	183	191	Right-handed alpha
Helix 9	AA9	C	369	388	Right-handed alpha
Helix 10	AB1	C	403	455	Right-handed alpha
Helix 11	AB2	C	474	479	Right-handed alpha
Helix 12	AB3	C	479	484	Right-handed alpha
Helix 13	AB4	C	487	499	Right-handed alpha
Helix 14	AB5	D	56	63	Right-handed alpha
Helix 15	AB6	D	64	71	Right-handed 310
Helix 16	AB7	D	97	106	Right-handed alpha
Helix 17	AB8	D	118	122	Right-handed 310
Helix 18	AB9	D	183	192	Right-handed alpha
Helix 19	AC1	D	369	388	Right-handed alpha
Helix 20	AC2	D	403	455	Right-handed alpha
Helix 21	AC3	D	476	484	Right-handed alpha
Helix 22	AC4	D	491	496	Right-handed alpha
Helix 23	AC5	H	62	66	Right-handed 310
Helix 24	AC6	H	143	145	Right-handed 310
Helix 25	AC7	H	172	174	Right-handed 310
Helix 26	AC8	H	203	205	Right-handed 310
Helix 27	AC9	I	56	63	Right-handed alpha
Helix 28	AD1	I	64	71	Right-handed 310
Helix 29	AD2	I	97	105	Right-handed alpha
Helix 30	AD3	I	118	122	Right-handed 310
Helix 31	AD4	I	183	191	Right-handed alpha
Helix 32	AD5	I	369	388	Right-handed alpha
Helix 33	AD6	I	403	455	Right-handed alpha
Helix 34	AD7	I	474	484	Right-handed alpha
Helix 35	AD8	I	487	492	Right-handed alpha
Helix 36	AD9	I	493	499	Right-handed alpha
Helix 37	AE1	K	79	83	Right-handed 310
Helix 38	AE2	K	121	126	Right-handed alpha
Helix 39	AE3	K	183	188	Right-handed alpha
Helix 40	AE4	L	79	83	Right-handed 310
Helix 41	AE5	L	121	127	Right-handed alpha
Helix 42	AE6	L	183	188	Right-handed alpha
Helix 43	AE7	A	62	66	Right-handed 310
Helix 44	AE8	A	143	145	Right-handed 310
Helix 45	AE9	A	172	174	Right-handed 310
Helix 46	AF1	A	203	205	Right-handed 310
Helix 47	AF2	G	62	66	Right-handed 310
Helix 48	AF3	G	143	145	Right-handed 310
Helix 49	AF4	G	172	174	Right-handed 310
Helix 50	AF5	G	203	205	Right-handed 310

There are 62 sheets in PDB entry 21BO. Click on sheet of interest to get list of strands forming it: AA1, AA2, AA3, AA4, AA5, AA6, AA7, AA8, AA9, AB1, AB2, AB3, AB4, AB5, AB6, AB7, AB8, AB9, AC1, AC2, AC3, AC4, AC5, AC6, AC7, AC8, AC9, AD1, AD2, AD3, AD4, AD5, AD6, AD7, AD8, AD9, AE1, AE2, AE3, AE4, AE5, AE6, AE7, AE8, AE9, AF1, AF2, AF3, AF4, AF5, AF6, AF7, AF8, AF9, AG1, AG2, AG3, AG4, AG5, AG6, AG7, AG8,

There are 4 strands in AA1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	5	6	first strand
Strand 2	B	19	24	anti-parallel
Strand 3	B	70	75	anti-parallel
Strand 4	B	62	67	anti-parallel

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There are 6 strands in AA2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	11	13	first strand
Strand 2	B	102	106	parallel
Strand 3	B	85	90	anti-parallel
Strand 4	B	33	38	anti-parallel
Strand 5	B	45	49	anti-parallel
Strand 6	B	53	54	anti-parallel

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There are 4 strands in AA3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	114	118	first strand
Strand 2	B	129	139	anti-parallel
Strand 3	B	173	182	anti-parallel
Strand 4	B	159	163	anti-parallel

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There are 3 strands in AA4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	145	150	first strand
Strand 2	B	191	197	anti-parallel
Strand 3	B	205	210	anti-parallel

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There are 3 strands in AA5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	2	7	first strand
Strand 2	C	351	357	anti-parallel
Strand 3	C	360	365	anti-parallel

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There are 2 strands in AA6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	15	16	first strand
Strand 2	C	24	25	anti-parallel

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There are 2 strands in AA7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	29	31	first strand
Strand 2	C	312	314	anti-parallel

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There are 3 strands in AA8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	33	34	first strand
Strand 2	C	291	292	parallel
Strand 3	C	304	305	parallel

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There are 2 strands in AA9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	41	44	first strand
Strand 2	C	271	276	parallel

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There are 3 strands in AB1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	50	53	first strand
Strand 2	C	79	81	parallel
Strand 3	C	264	266	parallel

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There are 5 strands in AB2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	93	95	first strand
Strand 2	C	225	233	parallel
Strand 3	C	172	180	anti-parallel
Strand 4	C	252	259	anti-parallel
Strand 5	C	108	115	anti-parallel

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There are 5 strands in AB3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	93	95	first strand
Strand 2	C	225	233	parallel
Strand 3	C	172	180	anti-parallel
Strand 4	C	247	250	anti-parallel
Strand 5	C	147	149	anti-parallel

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There are 2 strands in AB4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	132	137	first strand
Strand 2	C	140	142	anti-parallel

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There are 8 strands in AB5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	206	209	first strand
Strand 2	C	198	201	anti-parallel
Strand 3	C	241	243	anti-parallel
Strand 4	C	160	164	anti-parallel
Strand 5	A	109	119	parallel
Strand 6	A	92	104	anti-parallel
Strand 7	A	123	127	anti-parallel
Strand 8	A	11	12	parallel

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There are 9 strands in AB6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	206	209	first strand
Strand 2	C	198	201	anti-parallel
Strand 3	C	241	243	anti-parallel
Strand 4	C	160	164	anti-parallel
Strand 5	A	109	119	parallel
Strand 6	A	92	104	anti-parallel
Strand 7	A	33	40	anti-parallel
Strand 8	A	44	52	anti-parallel
Strand 9	A	58	60	anti-parallel

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There are 2 strands in AB7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	278	280	first strand
Strand 2	C	283	285	anti-parallel

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There are 2 strands in AB8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	459	461	first strand
Strand 2	C	467	469	anti-parallel

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There are 5 strands in AB9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	363	365	first strand
Strand 2	D	351	356	anti-parallel
Strand 3	D	2	7	anti-parallel
Strand 4	D	466	469	anti-parallel
Strand 5	D	459	461	anti-parallel

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There are 2 strands in AC1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	15	16	first strand
Strand 2	D	24	25	anti-parallel

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There are 2 strands in AC2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	30	31	first strand
Strand 2	D	312	313	anti-parallel

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There are 3 strands in AC3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	33	34	first strand
Strand 2	D	291	292	parallel
Strand 3	D	304	305	parallel

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There are 3 strands in AC4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	50	52	first strand
Strand 2	D	79	81	parallel
Strand 3	D	264	265	parallel

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There are 5 strands in AC5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	93	95	first strand
Strand 2	D	225	233	parallel
Strand 3	D	172	180	anti-parallel
Strand 4	D	252	259	anti-parallel
Strand 5	D	108	115	anti-parallel

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There are 5 strands in AC6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	93	95	first strand
Strand 2	D	225	233	parallel
Strand 3	D	172	180	anti-parallel
Strand 4	D	247	250	anti-parallel
Strand 5	D	147	149	anti-parallel

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There are 2 strands in AC7 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	151	152	anti-parallel

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There are 2 strands in AC8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	132	137	first strand
Strand 2	D	140	142	anti-parallel

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There are 8 strands in AC9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	206	209	first strand
Strand 2	D	198	201	anti-parallel
Strand 3	D	241	243	anti-parallel
Strand 4	D	160	164	anti-parallel
Strand 5	H	109	119	parallel
Strand 6	H	92	104	anti-parallel
Strand 7	H	123	127	anti-parallel
Strand 8	H	11	12	parallel

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There are 9 strands in AD1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	206	209	first strand
Strand 2	D	198	201	anti-parallel
Strand 3	D	241	243	anti-parallel
Strand 4	D	160	164	anti-parallel
Strand 5	H	109	119	parallel
Strand 6	H	92	104	anti-parallel
Strand 7	H	33	40	anti-parallel
Strand 8	H	44	52	anti-parallel
Strand 9	H	58	60	anti-parallel

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There are 2 strands in AD2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	278	279	first strand
Strand 2	D	299	300	anti-parallel

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There are 4 strands in AD3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	3	7	first strand
Strand 2	H	17	25	anti-parallel
Strand 3	H	78	84	anti-parallel
Strand 4	H	68	73	anti-parallel

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There are 4 strands in AD4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	136	140	first strand
Strand 2	H	151	161	anti-parallel
Strand 3	H	192	201	anti-parallel
Strand 4	H	180	181	anti-parallel

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There are 4 strands in AD5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	147	148	first strand
Strand 2	H	151	161	anti-parallel
Strand 3	H	192	201	anti-parallel
Strand 4	H	185	186	anti-parallel

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There are 3 strands in AD6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	167	170	first strand
Strand 2	H	210	216	anti-parallel
Strand 3	H	221	227	anti-parallel

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There are 5 strands in AD7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	363	365	first strand
Strand 2	I	351	356	anti-parallel
Strand 3	I	2	7	anti-parallel
Strand 4	I	466	469	anti-parallel
Strand 5	I	459	461	anti-parallel

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There are 2 strands in AD8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	15	16	first strand
Strand 2	I	24	25	anti-parallel

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There are 2 strands in AD9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	29	31	first strand
Strand 2	I	312	314	anti-parallel

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There are 2 strands in AE1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	41	44	first strand
Strand 2	I	271	276	parallel

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There are 3 strands in AE2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	50	51	first strand
Strand 2	I	79	81	parallel
Strand 3	I	264	266	parallel

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There are 5 strands in AE3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	93	95	first strand
Strand 2	I	225	233	parallel
Strand 3	I	172	180	anti-parallel
Strand 4	I	252	259	anti-parallel
Strand 5	I	108	115	anti-parallel

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There are 5 strands in AE4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	93	95	first strand
Strand 2	I	225	233	parallel
Strand 3	I	172	180	anti-parallel
Strand 4	I	247	250	anti-parallel
Strand 5	I	147	149	anti-parallel

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There are 2 strands in AE5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	132	137	first strand
Strand 2	I	140	142	anti-parallel

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There are 8 strands in AE6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	206	209	first strand
Strand 2	I	198	201	anti-parallel
Strand 3	I	238	243	anti-parallel
Strand 4	I	160	165	anti-parallel
Strand 5	G	109	119	parallel
Strand 6	G	92	104	anti-parallel
Strand 7	G	123	127	anti-parallel
Strand 8	G	11	12	parallel

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There are 9 strands in AE7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	206	209	first strand
Strand 2	I	198	201	anti-parallel
Strand 3	I	238	243	anti-parallel
Strand 4	I	160	165	anti-parallel
Strand 5	G	109	119	parallel
Strand 6	G	92	104	anti-parallel
Strand 7	G	33	40	anti-parallel
Strand 8	G	44	52	anti-parallel
Strand 9	G	58	60	anti-parallel

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There are 2 strands in AE8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	278	280	first strand
Strand 2	I	283	285	anti-parallel

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There are 2 strands in AE9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	291	292	first strand
Strand 2	I	304	305	parallel

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There are 4 strands in AF1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	5	6	first strand
Strand 2	K	19	24	anti-parallel
Strand 3	K	70	75	anti-parallel
Strand 4	K	62	67	anti-parallel

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There are 2 strands in AF2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	10	13	first strand
Strand 2	K	103	106	parallel

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There are 4 strands in AF3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	53	54	first strand
Strand 2	K	45	49	anti-parallel
Strand 3	K	33	38	anti-parallel
Strand 4	K	85	90	anti-parallel

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There are 4 strands in AF4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	114	118	first strand
Strand 2	K	129	139	anti-parallel
Strand 3	K	173	182	anti-parallel
Strand 4	K	159	163	anti-parallel

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There are 3 strands in AF5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	145	150	first strand
Strand 2	K	191	197	anti-parallel
Strand 3	K	205	210	anti-parallel

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There are 4 strands in AF6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	4	7	first strand
Strand 2	L	19	25	anti-parallel
Strand 3	L	70	75	anti-parallel
Strand 4	L	62	67	anti-parallel

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There are 6 strands in AF7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	10	12	first strand
Strand 2	L	102	105	parallel
Strand 3	L	85	90	anti-parallel
Strand 4	L	33	38	anti-parallel
Strand 5	L	45	49	anti-parallel
Strand 6	L	53	54	anti-parallel

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There are 4 strands in AF8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	114	118	first strand
Strand 2	L	129	139	anti-parallel
Strand 3	L	173	182	anti-parallel
Strand 4	L	159	163	anti-parallel

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There are 3 strands in AF9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	145	150	first strand
Strand 2	L	191	197	anti-parallel
Strand 3	L	205	210	anti-parallel

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There are 4 strands in AG1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	3	7	first strand
Strand 2	A	17	25	anti-parallel
Strand 3	A	78	84	anti-parallel
Strand 4	A	68	73	anti-parallel

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There are 4 strands in AG2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	136	140	first strand
Strand 2	A	151	161	anti-parallel
Strand 3	A	192	201	anti-parallel
Strand 4	A	180	181	anti-parallel

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There are 4 strands in AG3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	147	148	first strand
Strand 2	A	151	161	anti-parallel
Strand 3	A	192	201	anti-parallel
Strand 4	A	185	186	anti-parallel

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There are 3 strands in AG4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	167	170	first strand
Strand 2	A	210	216	anti-parallel
Strand 3	A	221	227	anti-parallel

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There are 4 strands in AG5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	3	7	first strand
Strand 2	G	17	25	anti-parallel
Strand 3	G	78	84	anti-parallel
Strand 4	G	68	73	anti-parallel

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There are 4 strands in AG6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	136	140	first strand
Strand 2	G	151	161	anti-parallel
Strand 3	G	192	201	anti-parallel
Strand 4	G	180	181	anti-parallel

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There are 4 strands in AG7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	147	148	first strand
Strand 2	G	151	161	anti-parallel
Strand 3	G	192	201	anti-parallel
Strand 4	G	185	186	anti-parallel

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There are 3 strands in AG8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	167	170	first strand
Strand 2	G	210	216	anti-parallel
Strand 3	G	221	227	anti-parallel

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Analysis of interatomic Contacts of Structural Units in PDB entry: 21BO

Analysis of interatomic Contacts of Structural Units in PDB entry:
21BO