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

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 4ZUK entry

There are 3 chains in PDB entry 4ZUK (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	THR 3	GLN 511
B	THR 3	GLN 511
C	THR 3	GLU 317

There are157 helices in PDB entry 4ZUK. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	AA1	A	4	18	Right-handed 310
Helix 2	AA2	A	56	75	Right-handed alpha
Helix 3	AA3	A	78	96	Right-handed alpha
Helix 4	AA4	A	96	108	Right-handed alpha
Helix 5	AA5	A	111	133	Right-handed alpha
Helix 6	AA6	A	170	183	Right-handed alpha
Helix 7	AA7	A	192	194	Right-handed 310
Helix 8	AA8	A	195	213	Right-handed alpha
Helix 9	AA9	A	216	218	Right-handed 310
Helix 10	AB1	A	226	236	Right-handed alpha
Helix 11	AB2	A	247	261	Right-handed alpha
Helix 12	AB3	A	282	296	Right-handed alpha
Helix 13	AB4	A	297	300	Right-handed 310
Helix 14	AB5	A	314	327	Right-handed alpha
Helix 15	AB6	A	346	363	Right-handed alpha
Helix 16	AB7	A	393	398	Right-handed alpha
Helix 17	AB8	A	412	422	Right-handed alpha
Helix 18	AB9	A	435	443	Right-handed alpha
Helix 19	AC1	A	471	475	Right-handed 310
Helix 20	AC2	A	483	487	Right-handed 310
Helix 21	AC3	B	4	18	Right-handed 310
Helix 22	AC4	B	56	75	Right-handed alpha
Helix 23	AC5	B	78	95	Right-handed alpha
Helix 24	AC6	B	96	108	Right-handed alpha
Helix 25	AC7	B	111	133	Right-handed alpha
Helix 26	AC8	B	170	183	Right-handed alpha
Helix 27	AC9	B	192	194	Right-handed 310
Helix 28	AD1	B	195	213	Right-handed alpha
Helix 29	AD2	B	216	218	Right-handed 310
Helix 30	AD3	B	226	236	Right-handed alpha
Helix 31	AD4	B	247	261	Right-handed alpha
Helix 32	AD5	B	282	296	Right-handed alpha
Helix 33	AD6	B	297	300	Right-handed 310
Helix 34	AD7	B	314	327	Right-handed alpha
Helix 35	AD8	B	346	363	Right-handed alpha
Helix 36	AD9	B	393	397	Right-handed 310
Helix 37	AE1	B	412	422	Right-handed alpha
Helix 38	AE2	B	435	443	Right-handed alpha
Helix 39	AE3	B	483	487	Right-handed 310
Helix 40	AE4	C	4	18	Right-handed 310
Helix 41	AE5	C	56	75	Right-handed alpha
Helix 42	AE6	C	78	96	Right-handed alpha
Helix 43	AE7	C	96	108	Right-handed alpha
Helix 44	AE8	C	111	133	Right-handed alpha
Helix 45	AE9	C	170	183	Right-handed alpha
Helix 46	AF1	C	192	194	Right-handed 310
Helix 47	AF2	C	195	213	Right-handed alpha
Helix 48	AF3	C	216	218	Right-handed 310
Helix 49	AF4	C	226	236	Right-handed alpha
Helix 50	AF5	C	247	261	Right-handed alpha
Helix 51	AF6	C	282	296	Right-handed alpha
Helix 52	AF7	C	297	300	Right-handed 310
Helix 53	AF8	C	312	327	Right-handed alpha
Helix 54	AF9	C	346	363	Right-handed alpha
Helix 55	AG1	C	393	398	Right-handed alpha
Helix 56	AG2	C	412	422	Right-handed alpha
Helix 57	AG3	C	435	444	Right-handed alpha
Helix 58	AG4	C	471	475	Right-handed 310
Helix 59	AG5	C	483	487	Right-handed 310
Helix 60	AG6	D	4	18	Right-handed 310
Helix 61	AG7	D	56	75	Right-handed alpha
Helix 62	AG8	D	78	96	Right-handed alpha
Helix 63	AG9	D	96	108	Right-handed alpha
Helix 64	AH1	D	111	133	Right-handed alpha
Helix 65	AH2	D	170	183	Right-handed alpha
Helix 66	AH3	D	192	194	Right-handed 310
Helix 67	AH4	D	195	213	Right-handed alpha
Helix 68	AH5	D	216	218	Right-handed 310
Helix 69	AH6	D	226	236	Right-handed alpha
Helix 70	AH7	D	247	261	Right-handed alpha
Helix 71	AH8	D	282	296	Right-handed alpha
Helix 72	AH9	D	297	300	Right-handed 310
Helix 73	AI1	D	314	327	Right-handed alpha
Helix 74	AI2	D	346	363	Right-handed alpha
Helix 75	AI3	D	393	398	Right-handed alpha
Helix 76	AI4	D	412	422	Right-handed alpha
Helix 77	AI5	D	435	443	Right-handed alpha
Helix 78	AI6	D	471	475	Right-handed 310
Helix 79	AI7	D	483	487	Right-handed 310
Helix 80	AI8	E	4	18	Right-handed 310
Helix 81	AI9	E	56	75	Right-handed alpha
Helix 82	AJ1	E	78	96	Right-handed alpha
Helix 83	AJ2	E	96	108	Right-handed alpha
Helix 84	AJ3	E	111	133	Right-handed alpha
Helix 85	AJ4	E	170	183	Right-handed alpha
Helix 86	AJ5	E	192	194	Right-handed 310
Helix 87	AJ6	E	195	213	Right-handed alpha
Helix 88	AJ7	E	216	218	Right-handed 310
Helix 89	AJ8	E	226	236	Right-handed alpha
Helix 90	AJ9	E	247	261	Right-handed alpha
Helix 91	AK1	E	282	296	Right-handed alpha
Helix 92	AK2	E	297	300	Right-handed 310
Helix 93	AK3	E	314	327	Right-handed alpha
Helix 94	AK4	E	346	363	Right-handed alpha
Helix 95	AK5	E	393	398	Right-handed alpha
Helix 96	AK6	E	412	422	Right-handed alpha
Helix 97	AK7	E	435	443	Right-handed alpha
Helix 98	AK8	E	483	487	Right-handed 310
Helix 99	AK9	F	4	18	Right-handed 310
Helix 100	AL1	F	56	75	Right-handed alpha
Helix 101	AL2	F	78	96	Right-handed alpha
Helix 102	AL3	F	96	108	Right-handed alpha
Helix 103	AL4	F	111	133	Right-handed alpha
Helix 104	AL5	F	170	183	Right-handed alpha
Helix 105	AL6	F	192	194	Right-handed 310
Helix 106	AL7	F	195	213	Right-handed alpha
Helix 107	AL8	F	216	218	Right-handed 310
Helix 108	AL9	F	226	236	Right-handed alpha
Helix 109	AM1	F	247	261	Right-handed alpha
Helix 110	AM2	F	282	296	Right-handed alpha
Helix 111	AM3	F	297	300	Right-handed 310
Helix 112	AM4	F	314	327	Right-handed alpha
Helix 113	AM5	F	346	363	Right-handed alpha
Helix 114	AM6	F	412	422	Right-handed alpha
Helix 115	AM7	F	435	443	Right-handed alpha
Helix 116	AM8	F	471	475	Right-handed 310
Helix 117	AM9	F	483	487	Right-handed 310
Helix 118	AN1	G	4	18	Right-handed 310
Helix 119	AN2	G	56	75	Right-handed alpha
Helix 120	AN3	G	78	96	Right-handed alpha
Helix 121	AN4	G	96	108	Right-handed alpha
Helix 122	AN5	G	111	133	Right-handed alpha
Helix 123	AN6	G	170	183	Right-handed alpha
Helix 124	AN7	G	192	194	Right-handed 310
Helix 125	AN8	G	195	213	Right-handed alpha
Helix 126	AN9	G	216	218	Right-handed 310
Helix 127	AO1	G	226	236	Right-handed alpha
Helix 128	AO2	G	247	261	Right-handed alpha
Helix 129	AO3	G	282	296	Right-handed alpha
Helix 130	AO4	G	297	300	Right-handed 310
Helix 131	AO5	G	314	327	Right-handed alpha
Helix 132	AO6	G	346	363	Right-handed alpha
Helix 133	AO7	G	393	397	Right-handed 310
Helix 134	AO8	G	412	422	Right-handed alpha
Helix 135	AO9	G	435	443	Right-handed alpha
Helix 136	AP1	G	471	475	Right-handed 310
Helix 137	AP2	G	483	487	Right-handed 310
Helix 138	AP3	H	4	18	Right-handed 310
Helix 139	AP4	H	56	75	Right-handed alpha
Helix 140	AP5	H	78	96	Right-handed alpha
Helix 141	AP6	H	96	108	Right-handed alpha
Helix 142	AP7	H	111	133	Right-handed alpha
Helix 143	AP8	H	170	183	Right-handed alpha
Helix 144	AP9	H	192	194	Right-handed 310
Helix 145	AQ1	H	195	213	Right-handed alpha
Helix 146	AQ2	H	216	218	Right-handed 310
Helix 147	AQ3	H	226	236	Right-handed alpha
Helix 148	AQ4	H	247	261	Right-handed alpha
Helix 149	AQ5	H	282	296	Right-handed alpha
Helix 150	AQ6	H	297	300	Right-handed 310
Helix 151	AQ7	H	314	327	Right-handed alpha
Helix 152	AQ8	H	346	363	Right-handed alpha
Helix 153	AQ9	H	394	398	Right-handed 310
Helix 154	AR1	H	412	422	Right-handed alpha
Helix 155	AR2	H	435	443	Right-handed alpha
Helix 156	AR3	H	471	475	Right-handed 310
Helix 157	AR4	H	483	487	Right-handed 310

There are 42 sheets in PDB entry 4ZUK. 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,

There are 3 strands in AA1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	22	24	first strand
Strand 2	A	48	53	parallel
Strand 3	A	37	41	anti-parallel

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There are 7 strands in AA2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	31	32	first strand
Strand 2	A	26	27	anti-parallel
Strand 3	A	220	223	anti-parallel
Strand 4	A	186	190	parallel
Strand 5	A	159	163	parallel
Strand 6	A	241	245	parallel
Strand 7	A	264	268	parallel

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There are 3 strands in AA3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	140	141	first strand
Strand 2	A	148	156	anti-parallel
Strand 3	A	489	497	anti-parallel

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There are 7 strands in AA4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	366	369	first strand
Strand 2	A	384	387	anti-parallel
Strand 3	A	404	410	parallel
Strand 4	A	305	311	parallel
Strand 5	A	273	277	parallel
Strand 6	A	428	432	parallel
Strand 7	A	452	455	parallel

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There are 2 strands in AA5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	467	468	first strand
Strand 2	A	479	480	anti-parallel

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There are 3 strands in AA6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	22	24	first strand
Strand 2	B	48	53	parallel
Strand 3	B	37	41	anti-parallel

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There are 7 strands in AA7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	31	32	first strand
Strand 2	B	26	27	anti-parallel
Strand 3	B	220	223	anti-parallel
Strand 4	B	186	190	parallel
Strand 5	B	159	163	parallel
Strand 6	B	241	245	parallel
Strand 7	B	264	268	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	B	140	141	first strand
Strand 2	B	148	156	anti-parallel
Strand 3	B	489	497	anti-parallel

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There are 7 strands in AA9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	366	369	first strand
Strand 2	B	384	387	anti-parallel
Strand 3	B	404	410	parallel
Strand 4	B	305	311	parallel
Strand 5	B	273	277	parallel
Strand 6	B	428	432	parallel
Strand 7	B	452	455	parallel

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There are 2 strands in AB1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	425	426	first strand
Strand 2	B	471	472	anti-parallel

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There are 2 strands in AB2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	467	468	first strand
Strand 2	B	479	480	anti-parallel

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There are 3 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	22	24	first strand
Strand 2	C	48	53	parallel
Strand 3	C	37	41	anti-parallel

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There are 7 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	31	32	first strand
Strand 2	C	26	27	anti-parallel
Strand 3	C	220	223	anti-parallel
Strand 4	C	186	190	parallel
Strand 5	C	159	163	parallel
Strand 6	C	241	245	parallel
Strand 7	C	264	268	parallel

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There are 3 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	140	141	first strand
Strand 2	C	148	156	anti-parallel
Strand 3	C	489	497	anti-parallel

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There are 7 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	366	369	first strand
Strand 2	C	384	387	anti-parallel
Strand 3	C	404	410	parallel
Strand 4	C	305	311	parallel
Strand 5	C	273	277	parallel
Strand 6	C	428	432	parallel
Strand 7	C	452	455	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	467	468	first strand
Strand 2	C	479	480	anti-parallel

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There are 3 strands in AB8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	22	24	first strand
Strand 2	D	48	53	parallel
Strand 3	D	37	41	anti-parallel

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There are 7 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	31	32	first strand
Strand 2	D	26	27	anti-parallel
Strand 3	D	220	223	anti-parallel
Strand 4	D	186	190	parallel
Strand 5	D	159	163	parallel
Strand 6	D	241	245	parallel
Strand 7	D	264	268	parallel

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There are 3 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	140	141	first strand
Strand 2	D	148	156	anti-parallel
Strand 3	D	489	497	anti-parallel

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There are 7 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	366	369	first strand
Strand 2	D	384	387	anti-parallel
Strand 3	D	404	410	parallel
Strand 4	D	305	311	parallel
Strand 5	D	273	277	parallel
Strand 6	D	428	432	parallel
Strand 7	D	452	455	parallel

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There are 2 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	467	468	first strand
Strand 2	D	479	480	anti-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	E	22	24	first strand
Strand 2	E	48	53	parallel
Strand 3	E	37	41	anti-parallel

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There are 7 strands in AC5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	31	32	first strand
Strand 2	E	26	27	anti-parallel
Strand 3	E	220	223	anti-parallel
Strand 4	E	186	190	parallel
Strand 5	E	159	163	parallel
Strand 6	E	241	245	parallel
Strand 7	E	264	268	parallel

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There are 3 strands in AC6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	140	141	first strand
Strand 2	E	148	156	anti-parallel
Strand 3	E	489	497	anti-parallel

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There are 7 strands in AC7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	366	369	first strand
Strand 2	E	384	387	anti-parallel
Strand 3	E	404	410	parallel
Strand 4	E	305	311	parallel
Strand 5	E	273	277	parallel
Strand 6	E	428	432	parallel
Strand 7	E	452	455	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	E	425	426	first strand
Strand 2	E	471	472	anti-parallel

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There are 2 strands in AC9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	467	468	first strand
Strand 2	E	479	480	anti-parallel

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There are 3 strands in AD1 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	22	24	first strand
Strand 2	F	48	53	parallel
Strand 3	F	37	41	anti-parallel

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There are 7 strands in AD2 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	31	32	first strand
Strand 2	F	26	27	anti-parallel
Strand 3	F	220	223	anti-parallel
Strand 4	F	186	190	parallel
Strand 5	F	159	163	parallel
Strand 6	F	241	245	parallel
Strand 7	F	264	268	parallel

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There are 3 strands in AD3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	140	141	first strand
Strand 2	F	148	156	anti-parallel
Strand 3	F	489	497	anti-parallel

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There are 7 strands in AD4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	366	369	first strand
Strand 2	F	384	387	anti-parallel
Strand 3	F	404	410	parallel
Strand 4	F	305	311	parallel
Strand 5	F	273	277	parallel
Strand 6	F	428	432	parallel
Strand 7	F	452	455	parallel

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There are 2 strands in AD5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	467	468	first strand
Strand 2	F	479	480	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	G	22	24	first strand
Strand 2	G	48	53	parallel
Strand 3	G	37	41	anti-parallel

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There are 7 strands in AD7 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	31	32	first strand
Strand 2	G	26	27	anti-parallel
Strand 3	G	220	223	anti-parallel
Strand 4	G	186	190	parallel
Strand 5	G	159	163	parallel
Strand 6	G	241	245	parallel
Strand 7	G	264	268	parallel

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There are 3 strands in AD8 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	140	141	first strand
Strand 2	G	148	156	anti-parallel
Strand 3	G	489	497	anti-parallel

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There are 7 strands in AD9 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	366	369	first strand
Strand 2	G	384	387	anti-parallel
Strand 3	G	404	410	parallel
Strand 4	G	305	311	parallel
Strand 5	G	273	277	parallel
Strand 6	G	428	432	parallel
Strand 7	G	452	455	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	G	467	468	first strand
Strand 2	G	479	480	anti-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	H	22	24	first strand
Strand 2	H	48	53	parallel
Strand 3	H	37	41	anti-parallel

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There are 7 strands in AE3 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	31	32	first strand
Strand 2	H	26	27	anti-parallel
Strand 3	H	220	223	anti-parallel
Strand 4	H	186	190	parallel
Strand 5	H	159	163	parallel
Strand 6	H	241	245	parallel
Strand 7	H	264	268	parallel

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There are 3 strands in AE4 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	140	141	first strand
Strand 2	H	148	156	anti-parallel
Strand 3	H	489	497	anti-parallel

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There are 7 strands in AE5 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	366	369	first strand
Strand 2	H	384	387	anti-parallel
Strand 3	H	404	410	parallel
Strand 4	H	305	311	parallel
Strand 5	H	273	277	parallel
Strand 6	H	428	432	parallel
Strand 7	H	452	455	parallel

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There are 2 strands in AE6 sheet. Click on strand of interest for CSU analysis.

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	467	468	first strand
Strand 2	H	479	480	anti-parallel

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

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