Analysis of interatomic Contacts of Structural Units in PDB entry:
3IKU

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 3IKU entry

There are 12 chains in PDB entry 3IKU (CSU analysis of residue contacts immediately below table)

Chain ID	Initial residue	Terminal residue
A	MET 1	ASN 320
B	MET 1	ASN 320
C	MET 1	ASN 320
D	MET 1	ASN 320
E	MET 1	ASN 320
F	MET 1	ASN 320
G	MET 1	ASN 320
H	MET 1	ASN 320
I	MET 1	ASN 320
J	MET 1	ASN 320
K	MET 1	ASN 320
L	MET 1	ASN 320

There are180 helices in PDB entry 3IKU. Click on helix of interest for CSU analysis.

Helix number	Helix ID	Chain ID	Initial residue	Terminal residue	Helix class
Helix 1	1	A	70	74	Right-handed 310
Helix 2	2	A	75	88	Right-handed alpha
Helix 3	3	A	103	108	Right-handed alpha
Helix 4	4	A	116	126	Right-handed alpha
Helix 5	5	A	148	158	Right-handed alpha
Helix 6	6	A	184	186	Right-handed 310
Helix 7	7	A	198	210	Right-handed alpha
Helix 8	8	A	215	217	Right-handed 310
Helix 9	9	A	218	228	Right-handed alpha
Helix 10	10	A	231	239	Right-handed alpha
Helix 11	11	A	242	268	Right-handed alpha
Helix 12	12	A	282	295	Right-handed alpha
Helix 13	13	A	297	299	Right-handed 310
Helix 14	14	A	306	308	Right-handed 310
Helix 15	15	A	309	320	Right-handed alpha
Helix 16	16	B	70	74	Right-handed 310
Helix 17	17	B	75	88	Right-handed alpha
Helix 18	18	B	103	108	Right-handed alpha
Helix 19	19	B	116	126	Right-handed alpha
Helix 20	20	B	148	158	Right-handed alpha
Helix 21	21	B	184	186	Right-handed 310
Helix 22	22	B	198	210	Right-handed alpha
Helix 23	23	B	215	217	Right-handed 310
Helix 24	24	B	218	228	Right-handed alpha
Helix 25	25	B	231	239	Right-handed alpha
Helix 26	26	B	242	268	Right-handed alpha
Helix 27	27	B	282	295	Right-handed alpha
Helix 28	28	B	297	299	Right-handed 310
Helix 29	29	B	306	308	Right-handed 310
Helix 30	30	B	309	320	Right-handed alpha
Helix 31	31	C	70	74	Right-handed 310
Helix 32	32	C	75	88	Right-handed alpha
Helix 33	33	C	103	108	Right-handed alpha
Helix 34	34	C	116	126	Right-handed alpha
Helix 35	35	C	148	158	Right-handed alpha
Helix 36	36	C	184	186	Right-handed 310
Helix 37	37	C	198	210	Right-handed alpha
Helix 38	38	C	215	217	Right-handed 310
Helix 39	39	C	218	228	Right-handed alpha
Helix 40	40	C	231	239	Right-handed alpha
Helix 41	41	C	242	268	Right-handed alpha
Helix 42	42	C	282	295	Right-handed alpha
Helix 43	43	C	297	299	Right-handed 310
Helix 44	44	C	306	308	Right-handed 310
Helix 45	45	C	309	320	Right-handed alpha
Helix 46	46	D	70	74	Right-handed 310
Helix 47	47	D	75	88	Right-handed alpha
Helix 48	48	D	103	108	Right-handed alpha
Helix 49	49	D	116	126	Right-handed alpha
Helix 50	50	D	148	158	Right-handed alpha
Helix 51	51	D	184	186	Right-handed 310
Helix 52	52	D	198	210	Right-handed alpha
Helix 53	53	D	215	217	Right-handed 310
Helix 54	54	D	218	228	Right-handed alpha
Helix 55	55	D	231	239	Right-handed alpha
Helix 56	56	D	242	268	Right-handed alpha
Helix 57	57	D	282	295	Right-handed alpha
Helix 58	58	D	297	299	Right-handed 310
Helix 59	59	D	306	308	Right-handed 310
Helix 60	60	D	309	320	Right-handed alpha
Helix 61	61	E	70	74	Right-handed 310
Helix 62	62	E	75	88	Right-handed alpha
Helix 63	63	E	103	108	Right-handed alpha
Helix 64	64	E	116	126	Right-handed alpha
Helix 65	65	E	148	158	Right-handed alpha
Helix 66	66	E	184	186	Right-handed 310
Helix 67	67	E	198	210	Right-handed alpha
Helix 68	68	E	215	217	Right-handed 310
Helix 69	69	E	218	228	Right-handed alpha
Helix 70	70	E	231	239	Right-handed alpha
Helix 71	71	E	242	268	Right-handed alpha
Helix 72	72	E	282	295	Right-handed alpha
Helix 73	73	E	297	299	Right-handed 310
Helix 74	74	E	306	308	Right-handed 310
Helix 75	75	E	309	320	Right-handed alpha
Helix 76	76	F	70	74	Right-handed 310
Helix 77	77	F	75	88	Right-handed alpha
Helix 78	78	F	103	108	Right-handed alpha
Helix 79	79	F	116	126	Right-handed alpha
Helix 80	80	F	148	158	Right-handed alpha
Helix 81	81	F	184	186	Right-handed 310
Helix 82	82	F	198	210	Right-handed alpha
Helix 83	83	F	215	217	Right-handed 310
Helix 84	84	F	218	228	Right-handed alpha
Helix 85	85	F	231	239	Right-handed alpha
Helix 86	86	F	242	268	Right-handed alpha
Helix 87	87	F	282	295	Right-handed alpha
Helix 88	88	F	297	299	Right-handed 310
Helix 89	89	F	306	308	Right-handed 310
Helix 90	90	F	309	320	Right-handed alpha
Helix 91	91	G	70	74	Right-handed 310
Helix 92	92	G	75	88	Right-handed alpha
Helix 93	93	G	103	108	Right-handed alpha
Helix 94	94	G	116	126	Right-handed alpha
Helix 95	95	G	148	158	Right-handed alpha
Helix 96	96	G	184	186	Right-handed 310
Helix 97	97	G	198	210	Right-handed alpha
Helix 98	98	G	215	217	Right-handed 310
Helix 99	99	G	218	228	Right-handed alpha
Helix 100	100	G	231	239	Right-handed alpha
Helix 101	101	G	242	268	Right-handed alpha
Helix 102	102	G	282	295	Right-handed alpha
Helix 103	103	G	297	299	Right-handed 310
Helix 104	104	G	306	308	Right-handed 310
Helix 105	105	G	309	320	Right-handed alpha
Helix 106	106	H	70	74	Right-handed 310
Helix 107	107	H	75	88	Right-handed alpha
Helix 108	108	H	103	108	Right-handed alpha
Helix 109	109	H	116	126	Right-handed alpha
Helix 110	110	H	148	158	Right-handed alpha
Helix 111	111	H	184	186	Right-handed 310
Helix 112	112	H	198	210	Right-handed alpha
Helix 113	113	H	215	217	Right-handed 310
Helix 114	114	H	218	228	Right-handed alpha
Helix 115	115	H	231	239	Right-handed alpha
Helix 116	116	H	242	268	Right-handed alpha
Helix 117	117	H	282	295	Right-handed alpha
Helix 118	118	H	297	299	Right-handed 310
Helix 119	119	H	306	308	Right-handed 310
Helix 120	120	H	309	320	Right-handed alpha
Helix 121	121	I	70	74	Right-handed 310
Helix 122	122	I	75	88	Right-handed alpha
Helix 123	123	I	103	108	Right-handed alpha
Helix 124	124	I	116	126	Right-handed alpha
Helix 125	125	I	148	158	Right-handed alpha
Helix 126	126	I	184	186	Right-handed 310
Helix 127	127	I	198	210	Right-handed alpha
Helix 128	128	I	215	217	Right-handed 310
Helix 129	129	I	218	228	Right-handed alpha
Helix 130	130	I	231	239	Right-handed alpha
Helix 131	131	I	242	268	Right-handed alpha
Helix 132	132	I	282	295	Right-handed alpha
Helix 133	133	I	297	299	Right-handed 310
Helix 134	134	I	306	308	Right-handed 310
Helix 135	135	I	309	320	Right-handed alpha
Helix 136	136	J	70	74	Right-handed 310
Helix 137	137	J	75	88	Right-handed alpha
Helix 138	138	J	103	108	Right-handed alpha
Helix 139	139	J	116	126	Right-handed alpha
Helix 140	140	J	148	158	Right-handed alpha
Helix 141	141	J	184	186	Right-handed 310
Helix 142	142	J	198	210	Right-handed alpha
Helix 143	143	J	215	217	Right-handed 310
Helix 144	144	J	218	228	Right-handed alpha
Helix 145	145	J	231	239	Right-handed alpha
Helix 146	146	J	242	268	Right-handed alpha
Helix 147	147	J	282	295	Right-handed alpha
Helix 148	148	J	297	299	Right-handed 310
Helix 149	149	J	306	308	Right-handed 310
Helix 150	150	J	309	320	Right-handed alpha
Helix 151	151	K	70	74	Right-handed 310
Helix 152	152	K	75	88	Right-handed alpha
Helix 153	153	K	103	108	Right-handed alpha
Helix 154	154	K	116	126	Right-handed alpha
Helix 155	155	K	148	158	Right-handed alpha
Helix 156	156	K	184	186	Right-handed 310
Helix 157	157	K	198	210	Right-handed alpha
Helix 158	158	K	215	217	Right-handed 310
Helix 159	159	K	218	228	Right-handed alpha
Helix 160	160	K	231	239	Right-handed alpha
Helix 161	161	K	242	268	Right-handed alpha
Helix 162	162	K	282	295	Right-handed alpha
Helix 163	163	K	297	299	Right-handed 310
Helix 164	164	K	306	308	Right-handed 310
Helix 165	165	K	309	320	Right-handed alpha
Helix 166	166	L	70	74	Right-handed 310
Helix 167	167	L	75	88	Right-handed alpha
Helix 168	168	L	103	108	Right-handed alpha
Helix 169	169	L	116	126	Right-handed alpha
Helix 170	170	L	148	158	Right-handed alpha
Helix 171	171	L	184	186	Right-handed 310
Helix 172	172	L	198	210	Right-handed alpha
Helix 173	173	L	215	217	Right-handed 310
Helix 174	174	L	218	228	Right-handed alpha
Helix 175	175	L	231	239	Right-handed alpha
Helix 176	176	L	242	268	Right-handed alpha
Helix 177	177	L	282	295	Right-handed alpha
Helix 178	178	L	297	299	Right-handed 310
Helix 179	179	L	306	308	Right-handed 310
Helix 180	180	L	309	320	Right-handed alpha

There are 36 sheets in PDB entry 3IKU. Click on sheet of interest to get list of strands forming it: A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z, AA, AB, AC, AD, AE, AF, AG, AH, AI, AJ,

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	23	29	first strand
Strand 2	A	11	17	anti-parallel
Strand 3	A	2	7	anti-parallel
Strand 4	A	95	99	parallel
Strand 5	A	139	140	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	32	33	first strand
Strand 2	A	54	57	anti-parallel
Strand 3	A	47	49	anti-parallel
Strand 4	A	131	132	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	A	188	194	first strand
Strand 2	A	176	182	anti-parallel
Strand 3	A	165	171	anti-parallel
Strand 4	A	275	279	parallel
Strand 5	A	301	302	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	23	29	first strand
Strand 2	B	11	17	anti-parallel
Strand 3	B	2	7	anti-parallel
Strand 4	B	95	99	parallel
Strand 5	B	139	140	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	32	33	first strand
Strand 2	B	54	57	anti-parallel
Strand 3	B	47	49	anti-parallel
Strand 4	B	131	132	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	B	188	194	first strand
Strand 2	B	176	182	anti-parallel
Strand 3	B	165	171	anti-parallel
Strand 4	B	275	279	parallel
Strand 5	B	301	302	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	23	29	first strand
Strand 2	C	11	17	anti-parallel
Strand 3	C	2	7	anti-parallel
Strand 4	C	95	99	parallel
Strand 5	C	139	140	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	32	33	first strand
Strand 2	C	54	57	anti-parallel
Strand 3	C	47	49	anti-parallel
Strand 4	C	131	132	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	C	188	194	first strand
Strand 2	C	176	182	anti-parallel
Strand 3	C	165	171	anti-parallel
Strand 4	C	275	279	parallel
Strand 5	C	301	302	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	23	29	first strand
Strand 2	D	11	17	anti-parallel
Strand 3	D	2	7	anti-parallel
Strand 4	D	95	99	parallel
Strand 5	D	139	140	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	32	33	first strand
Strand 2	D	54	57	anti-parallel
Strand 3	D	47	49	anti-parallel
Strand 4	D	131	132	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	D	188	194	first strand
Strand 2	D	176	182	anti-parallel
Strand 3	D	165	171	anti-parallel
Strand 4	D	275	279	parallel
Strand 5	D	301	302	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	23	29	first strand
Strand 2	E	11	17	anti-parallel
Strand 3	E	2	7	anti-parallel
Strand 4	E	95	99	parallel
Strand 5	E	139	140	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	32	33	first strand
Strand 2	E	54	57	anti-parallel
Strand 3	E	47	49	anti-parallel
Strand 4	E	131	132	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	E	188	194	first strand
Strand 2	E	176	182	anti-parallel
Strand 3	E	165	171	anti-parallel
Strand 4	E	275	279	parallel
Strand 5	E	301	302	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	23	29	first strand
Strand 2	F	11	17	anti-parallel
Strand 3	F	2	7	anti-parallel
Strand 4	F	95	99	parallel
Strand 5	F	139	140	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	32	33	first strand
Strand 2	F	54	57	anti-parallel
Strand 3	F	47	49	anti-parallel
Strand 4	F	131	132	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	F	188	194	first strand
Strand 2	F	176	182	anti-parallel
Strand 3	F	165	171	anti-parallel
Strand 4	F	275	279	parallel
Strand 5	F	301	302	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	23	29	first strand
Strand 2	G	11	17	anti-parallel
Strand 3	G	2	7	anti-parallel
Strand 4	G	95	99	parallel
Strand 5	G	139	140	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	32	33	first strand
Strand 2	G	54	57	anti-parallel
Strand 3	G	47	49	anti-parallel
Strand 4	G	131	132	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	G	188	194	first strand
Strand 2	G	176	182	anti-parallel
Strand 3	G	165	171	anti-parallel
Strand 4	G	275	279	parallel
Strand 5	G	301	302	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	23	29	first strand
Strand 2	H	11	17	anti-parallel
Strand 3	H	2	7	anti-parallel
Strand 4	H	95	99	parallel
Strand 5	H	139	140	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	32	33	first strand
Strand 2	H	54	57	anti-parallel
Strand 3	H	47	49	anti-parallel
Strand 4	H	131	132	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	H	188	194	first strand
Strand 2	H	176	182	anti-parallel
Strand 3	H	165	171	anti-parallel
Strand 4	H	275	279	parallel
Strand 5	H	301	302	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	23	29	first strand
Strand 2	I	11	17	anti-parallel
Strand 3	I	2	7	anti-parallel
Strand 4	I	95	99	parallel
Strand 5	I	139	140	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	32	33	first strand
Strand 2	I	54	57	anti-parallel
Strand 3	I	47	49	anti-parallel
Strand 4	I	131	132	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	I	188	194	first strand
Strand 2	I	176	182	anti-parallel
Strand 3	I	165	171	anti-parallel
Strand 4	I	275	279	parallel
Strand 5	I	301	302	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	23	29	first strand
Strand 2	J	11	17	anti-parallel
Strand 3	J	2	7	anti-parallel
Strand 4	J	95	99	parallel
Strand 5	J	139	140	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	J	32	33	first strand
Strand 2	J	54	57	anti-parallel
Strand 3	J	47	49	anti-parallel
Strand 4	J	131	132	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	J	188	194	first strand
Strand 2	J	176	182	anti-parallel
Strand 3	J	165	171	anti-parallel
Strand 4	J	275	279	parallel
Strand 5	J	301	302	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	23	29	first strand
Strand 2	K	11	17	anti-parallel
Strand 3	K	2	7	anti-parallel
Strand 4	K	95	99	parallel
Strand 5	K	139	140	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	K	32	33	first strand
Strand 2	K	54	57	anti-parallel
Strand 3	K	47	49	anti-parallel
Strand 4	K	131	132	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	K	188	194	first strand
Strand 2	K	176	182	anti-parallel
Strand 3	K	165	171	anti-parallel
Strand 4	K	275	279	parallel
Strand 5	K	301	302	parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	23	29	first strand
Strand 2	L	11	17	anti-parallel
Strand 3	L	2	7	anti-parallel
Strand 4	L	95	99	parallel
Strand 5	L	139	140	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	L	32	33	first strand
Strand 2	L	54	57	anti-parallel
Strand 3	L	47	49	anti-parallel
Strand 4	L	131	132	anti-parallel

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

Strand number	Chain ID	Initial residue	Terminal residue	Strand sense
Strand 1	L	188	194	first strand
Strand 2	L	176	182	anti-parallel
Strand 3	L	165	171	anti-parallel
Strand 4	L	275	279	parallel
Strand 5	L	301	302	parallel

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Please mail questions/suggestions concerning this page to Vladimir.Sobolev@weizmann. ac.il

Analysis of interatomic Contacts of Structural Units in PDB entry: 3IKU

Analysis of interatomic Contacts of Structural Units in PDB entry:
3IKU