Analysis of interatomic Contacts of Structural Units in PDB entry:
9V5H


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).
For CSU analysis of other PDB entry

This page provides analyses of contacts formed by:
For analysis of ligand-protein contacts, use: 3D structure can be seen in additional window with STING software for 9V5H entry

There are 12 chains in PDB entry 9V5H (CSU analysis of residue contacts immediately below table)
Chain ID Initial residueTerminal residue
A
MET 1GLN 300
B
MET 1GLN 300
C
MET 1GLN 300
D
MET 1GLN 300
E
MET 1GLN 300
F
MET 1GLN 300
G
MET 316ASP 657
H
MET 316ASP 657
I
MET 316ASP 657
J
MET 316ASP 657
K
MET 316ASP 657
L
MET 316ASP 657
Residue contacts

1. List of contacts for up to 10 consecutive residues:
Chain ID from residue number to residue number


2. Detailed analyses of contacts for any single residue:
Residue number chain ID
Back to top of page

There are143 helices in PDB entry 9V5H. Click on helix of interest for CSU analysis.
Helix
number
Helix
ID
Chain
ID
Initial
residue
Terminal
residue
Helix class
Helix 1
AA1
A
8 21Right-handed alpha
Helix 2
AA2
A
44 52Right-handed alpha
Helix 3
AA3
A
64 75Right-handed alpha
Helix 4
AA4
A
89 94Right-handed alpha
Helix 5
AA5
A
115 123Right-handed alpha
Helix 6
AA6
A
157 183Right-handed alpha
Helix 7
AA7
A
202 207Right-handed 310
Helix 8
AA8
A
213 224Right-handed alpha
Helix 9
AA9
A
288 296Right-handed alpha
Helix 10
AB1
B
8 22Right-handed alpha
Helix 11
AB2
B
44 52Right-handed alpha
Helix 12
AB3
B
64 75Right-handed alpha
Helix 13
AB4
B
89 94Right-handed alpha
Helix 14
AB5
B
115 124Right-handed alpha
Helix 15
AB6
B
157 183Right-handed alpha
Helix 16
AB7
B
191 195Right-handed 310
Helix 17
AB8
B
202 207Right-handed 310
Helix 18
AB9
B
213 224Right-handed alpha
Helix 19
AC1
B
288 296Right-handed alpha
Helix 20
AC2
C
8 23Right-handed alpha
Helix 21
AC3
C
44 52Right-handed alpha
Helix 22
AC4
C
64 75Right-handed alpha
Helix 23
AC5
C
89 94Right-handed alpha
Helix 24
AC6
C
115 123Right-handed alpha
Helix 25
AC7
C
157 183Right-handed alpha
Helix 26
AC8
C
191 195Right-handed 310
Helix 27
AC9
C
213 224Right-handed alpha
Helix 28
AD1
C
288 297Right-handed alpha
Helix 29
AD2
D
8 23Right-handed alpha
Helix 30
AD3
D
44 52Right-handed alpha
Helix 31
AD4
D
64 75Right-handed alpha
Helix 32
AD5
D
89 94Right-handed alpha
Helix 33
AD6
D
115 121Right-handed alpha
Helix 34
AD7
D
157 183Right-handed alpha
Helix 35
AD8
D
202 207Right-handed 310
Helix 36
AD9
D
213 224Right-handed alpha
Helix 37
AE1
D
288 297Right-handed alpha
Helix 38
AE2
E
8 23Right-handed alpha
Helix 39
AE3
E
44 53Right-handed alpha
Helix 40
AE4
E
64 75Right-handed alpha
Helix 41
AE5
E
89 94Right-handed alpha
Helix 42
AE6
E
115 122Right-handed alpha
Helix 43
AE7
E
157 183Right-handed alpha
Helix 44
AE8
E
191 195Right-handed 310
Helix 45
AE9
E
202 206Right-handed 310
Helix 46
AF1
E
213 224Right-handed alpha
Helix 47
AF2
E
288 297Right-handed alpha
Helix 48
AF3
F
8 22Right-handed alpha
Helix 49
AF4
F
44 53Right-handed alpha
Helix 50
AF5
F
64 75Right-handed alpha
Helix 51
AF6
F
89 94Right-handed alpha
Helix 52
AF7
F
115 123Right-handed alpha
Helix 53
AF8
F
157 183Right-handed alpha
Helix 54
AF9
F
191 195Right-handed 310
Helix 55
AG1
F
202 207Right-handed 310
Helix 56
AG2
F
213 224Right-handed alpha
Helix 57
AG3
F
289 297Right-handed alpha
Helix 58
AG4
G
325 336Right-handed alpha
Helix 59
AG5
G
350 354Right-handed 310
Helix 60
AG6
G
373 383Right-handed alpha
Helix 61
AG7
G
394 401Right-handed alpha
Helix 62
AG8
G
401 423Right-handed alpha
Helix 63
AG9
G
459 482Right-handed alpha
Helix 64
AH1
G
509 522Right-handed alpha
Helix 65
AH2
G
528 531Right-handed 310
Helix 66
AH3
G
540 553Right-handed alpha
Helix 67
AH4
G
574 586Right-handed alpha
Helix 68
AH5
G
590 594Right-handed 310
Helix 69
AH6
G
623 631Right-handed alpha
Helix 70
AH7
G
637 652Right-handed alpha
Helix 71
AH8
H
325 336Right-handed alpha
Helix 72
AH9
H
350 354Right-handed 310
Helix 73
AI1
H
355 359Right-handed 310
Helix 74
AI2
H
373 383Right-handed alpha
Helix 75
AI3
H
394 401Right-handed alpha
Helix 76
AI4
H
401 424Right-handed alpha
Helix 77
AI5
H
432 436Right-handed 310
Helix 78
AI6
H
461 482Right-handed alpha
Helix 79
AI7
H
509 522Right-handed alpha
Helix 80
AI8
H
528 532Right-handed 310
Helix 81
AI9
H
539 553Right-handed alpha
Helix 82
AJ1
H
554 557Right-handed 310
Helix 83
AJ2
H
574 586Right-handed alpha
Helix 84
AJ3
H
587 594Right-handed 310
Helix 85
AJ4
H
623 631Right-handed alpha
Helix 86
AJ5
H
638 652Right-handed alpha
Helix 87
AJ6
I
325 336Right-handed alpha
Helix 88
AJ7
I
350 354Right-handed 310
Helix 89
AJ8
I
355 359Right-handed 310
Helix 90
AJ9
I
373 383Right-handed alpha
Helix 91
AK1
I
396 401Right-handed alpha
Helix 92
AK2
I
401 409Right-handed alpha
Helix 93
AK3
I
410 423Right-handed alpha
Helix 94
AK4
I
432 436Right-handed 310
Helix 95
AK5
I
461 480Right-handed alpha
Helix 96
AK6
I
509 521Right-handed alpha
Helix 97
AK7
I
528 531Right-handed 310
Helix 98
AK8
I
540 553Right-handed alpha
Helix 99
AK9
I
554 557Right-handed 310
Helix 100
AL1
I
574 586Right-handed alpha
Helix 101
AL2
I
590 594Right-handed 310
Helix 102
AL3
I
623 630Right-handed alpha
Helix 103
AL4
I
637 652Right-handed alpha
Helix 104
AL5
J
325 336Right-handed alpha
Helix 105
AL6
J
350 354Right-handed 310
Helix 106
AL7
J
373 383Right-handed alpha
Helix 107
AL8
J
396 401Right-handed alpha
Helix 108
AL9
J
401 410Right-handed alpha
Helix 109
AM1
J
410 424Right-handed alpha
Helix 110
AM2
J
432 436Right-handed 310
Helix 111
AM3
J
460 482Right-handed alpha
Helix 112
AM4
J
509 521Right-handed alpha
Helix 113
AM5
J
540 552Right-handed alpha
Helix 114
AM6
J
553 557Right-handed 310
Helix 115
AM7
J
574 587Right-handed alpha
Helix 116
AM8
J
590 594Right-handed 310
Helix 117
AM9
J
623 631Right-handed alpha
Helix 118
AN1
J
637 652Right-handed alpha
Helix 119
AN2
K
325 336Right-handed alpha
Helix 120
AN3
K
373 383Right-handed alpha
Helix 121
AN4
K
394 401Right-handed alpha
Helix 122
AN5
K
401 423Right-handed alpha
Helix 123
AN6
K
432 436Right-handed 310
Helix 124
AN7
K
461 481Right-handed alpha
Helix 125
AN8
K
509 521Right-handed alpha
Helix 126
AN9
K
540 552Right-handed alpha
Helix 127
AO1
K
553 557Right-handed 310
Helix 128
AO2
K
574 586Right-handed alpha
Helix 129
AO3
K
588 594Right-handed 310
Helix 130
AO4
K
623 630Right-handed alpha
Helix 131
AO5
K
637 652Right-handed alpha
Helix 132
AO6
L
325 336Right-handed alpha
Helix 133
AO7
L
373 383Right-handed alpha
Helix 134
AO8
L
394 401Right-handed alpha
Helix 135
AO9
L
401 410Right-handed alpha
Helix 136
AP1
L
410 423Right-handed alpha
Helix 137
AP2
L
459 480Right-handed alpha
Helix 138
AP3
L
509 521Right-handed alpha
Helix 139
AP4
L
540 552Right-handed alpha
Helix 140
AP5
L
573 586Right-handed alpha
Helix 141
AP6
L
588 594Right-handed 310
Helix 142
AP7
L
623 630Right-handed alpha
Helix 143
AP8
L
638 652Right-handed alpha
Back to top of page

There are 44 sheets in PDB entry 9V5H. 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,

There are 2 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
3 5first strand
Strand 2
A
26 29parallel
Back to list of sheets
Back to top of page

There are 4 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
79 82first strand
Strand 2
A
100 104parallel
Strand 3
A
128 133anti-parallel
Strand 4
A
144 150anti-parallel
Back to list of sheets
Back to top of page

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
A
231 235first strand
Strand 2
A
238 248anti-parallel
Strand 3
A
273 280anti-parallel
Strand 4
A
266 268anti-parallel
Back to list of sheets
Back to top of page

There are 2 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
2 3first strand
Strand 2
B
25 26parallel
Back to list of sheets
Back to top of page

There are 5 strands in AA5 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
B
6 7first strand
Strand 2
B
79 82parallel
Strand 3
B
100 104parallel
Strand 4
B
128 134anti-parallel
Strand 5
B
144 150anti-parallel
Back to list of sheets
Back to top of page

There are 4 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
231 235first strand
Strand 2
B
238 248anti-parallel
Strand 3
B
273 281anti-parallel
Strand 4
B
266 268anti-parallel
Back to list of sheets
Back to top of page

There are 4 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
231 235first strand
Strand 2
B
238 248anti-parallel
Strand 3
B
273 281anti-parallel
Strand 4
B
286 287anti-parallel
Back to list of sheets
Back to top of page

There are 6 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
25 30first strand
Strand 2
C
2 7parallel
Strand 3
C
78 82parallel
Strand 4
C
99 104parallel
Strand 5
C
128 134anti-parallel
Strand 6
C
144 150anti-parallel
Back to list of sheets
Back to top of page

There are 4 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
231 235first strand
Strand 2
C
238 248anti-parallel
Strand 3
C
273 281anti-parallel
Strand 4
C
266 268anti-parallel
Back to list of sheets
Back to top of page

There are 7 strands in AB1 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
D
56 57first strand
Strand 2
D
25 30parallel
Strand 3
D
2 7parallel
Strand 4
D
78 82parallel
Strand 5
D
100 104parallel
Strand 6
D
127 134anti-parallel
Strand 7
D
144 151anti-parallel
Back to list of sheets
Back to top of page

There are 3 strands in AB2 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
D
231 235first strand
Strand 2
D
238 242anti-parallel
Strand 3
D
279 281anti-parallel
Back to list of sheets
Back to top of page

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
D
246 248first strand
Strand 2
D
273 275anti-parallel
Strand 3
D
266 268anti-parallel
Back to list of sheets
Back to top of page

There are 3 strands in AB4 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
E
3 5first strand
Strand 2
E
26 30parallel
Strand 3
E
56 57parallel
Back to list of sheets
Back to top of page

There are 4 strands in AB5 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
E
79 82first strand
Strand 2
E
100 104parallel
Strand 3
E
128 134anti-parallel
Strand 4
E
144 150anti-parallel
Back to list of sheets
Back to top of page

There are 4 strands in AB6 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
E
231 235first strand
Strand 2
E
238 248anti-parallel
Strand 3
E
273 280anti-parallel
Strand 4
E
267 268anti-parallel
Back to list of sheets
Back to top of page

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
F
3 5first strand
Strand 2
F
26 29parallel
Back to list of sheets
Back to top of page

There are 4 strands in AB8 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
F
79 82first strand
Strand 2
F
100 104parallel
Strand 3
F
128 134anti-parallel
Strand 4
F
144 150anti-parallel
Back to list of sheets
Back to top of page

There are 4 strands in AB9 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
F
231 235first strand
Strand 2
F
238 248anti-parallel
Strand 3
F
273 281anti-parallel
Strand 4
F
266 268anti-parallel
Back to list of sheets
Back to top of page

There are 4 strands in AC1 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
F
231 235first strand
Strand 2
F
238 248anti-parallel
Strand 3
F
273 281anti-parallel
Strand 4
F
286 288anti-parallel
Back to list of sheets
Back to top of page

There are 4 strands in AC2 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
G
362 365first strand
Strand 2
G
342 346parallel
Strand 3
G
317 321parallel
Strand 4
G
385 388parallel
Back to list of sheets
Back to top of page

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
G
427 430first strand
Strand 2
G
485 489parallel
Strand 3
G
563 564parallel
Back to list of sheets
Back to top of page

There are 2 strands in AC4 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
G
493 494first strand
Strand 2
G
538 539parallel
Back to list of sheets
Back to top of page

There are 2 strands in AC5 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
G
525 527first strand
Strand 2
G
600 602parallel
Back to list of sheets
Back to top of page

There are 2 strands in AC6 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
G
534 536first strand
Strand 2
G
571 573anti-parallel
Back to list of sheets
Back to top of page

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
H
362 365first strand
Strand 2
H
342 346parallel
Strand 3
H
317 321parallel
Strand 4
H
385 388parallel
Strand 5
H
426 430parallel
Strand 6
H
485 490parallel
Strand 7
H
563 565parallel
Back to list of sheets
Back to top of page

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
H
525 527first strand
Strand 2
H
600 602parallel
Back to list of sheets
Back to top of page

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
H
534 535first strand
Strand 2
H
572 573anti-parallel
Back to list of sheets
Back to top of page

There are 7 strands in AD1 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
I
362 366first strand
Strand 2
I
342 347parallel
Strand 3
I
317 321parallel
Strand 4
I
385 388parallel
Strand 5
I
426 430parallel
Strand 6
I
485 490parallel
Strand 7
I
561 565parallel
Back to list of sheets
Back to top of page

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
I
493 494first strand
Strand 2
I
538 539parallel
Back to list of sheets
Back to top of page

There are 2 strands in AD3 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
I
525 527first strand
Strand 2
I
600 602parallel
Back to list of sheets
Back to top of page

There are 2 strands in AD4 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
I
534 535first strand
Strand 2
I
572 573anti-parallel
Back to list of sheets
Back to top of page

There are 7 strands in AD5 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
J
362 366first strand
Strand 2
J
342 347parallel
Strand 3
J
317 321parallel
Strand 4
J
385 388parallel
Strand 5
J
426 430parallel
Strand 6
J
485 490parallel
Strand 7
J
563 565parallel
Back to list of sheets
Back to top of page

There are 2 strands in AD6 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
J
493 494first strand
Strand 2
J
538 539parallel
Back to list of sheets
Back to top of page

There are 2 strands in AD7 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
J
526 528first strand
Strand 2
J
601 603parallel
Back to list of sheets
Back to top of page

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
J
534 536first strand
Strand 2
J
571 573anti-parallel
Back to list of sheets
Back to top of page

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
K
362 365first strand
Strand 2
K
342 346parallel
Strand 3
K
317 321parallel
Strand 4
K
385 388parallel
Strand 5
K
426 430parallel
Strand 6
K
485 489parallel
Strand 7
K
563 564parallel
Back to list of sheets
Back to top of page

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
K
493 494first strand
Strand 2
K
538 539parallel
Back to list of sheets
Back to top of page

There are 2 strands in AE2 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
K
525 528first strand
Strand 2
K
600 603parallel
Back to list of sheets
Back to top of page

There are 2 strands in AE3 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
K
534 536first strand
Strand 2
K
571 573anti-parallel
Back to list of sheets
Back to top of page

There are 4 strands in AE4 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
L
362 365first strand
Strand 2
L
342 346parallel
Strand 3
L
317 321parallel
Strand 4
L
385 388parallel
Back to list of sheets
Back to top of page

There are 3 strands in AE5 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
L
427 430first strand
Strand 2
L
485 490parallel
Strand 3
L
561 565parallel
Back to list of sheets
Back to top of page

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
L
493 494first strand
Strand 2
L
538 539parallel
Back to list of sheets
Back to top of page

There are 2 strands in AE7 sheet. Click on strand of interest for CSU analysis.
Strand
number
Chain
ID
Initial
residue
Terminal
residue
Strand sense
Strand 1
L
525 528first strand
Strand 2
L
600 603parallel
Back to list of sheets
Back to top of page

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
L
535 536first strand
Strand 2
L
571 572anti-parallel
Back to list of sheets
Back to top of page

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