SEQ2FUN

BioLiP
Download all results in tab-seperated text for 1072681 receptor-ligand interactions, whose format is explained at readme.txt.
  • Hover over PDB to view the title of the structure. Click PDB to view the structure at the RCSB PDB database. Resolution -1.00 means the resolution is unavailable, e.g., for NMR structures.
  • Click Site # to view the binding site structure. Hover over Site # to view the binding residues.
  • Hover over Ligand to view the full ligand name. Click Ligand to view the 2D diagram and other detail information of the ligand.
  • Hover over EC number to view the full name of enzymatic activity.
  • Hover over GO terms to view all GO terms.
  • Hover over UniProt to view the protein name.
  • Sort results by
    << < 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 > >>
    Go to page

    # PDB
    (Resolution Å)
    Site # Ligand EC number GO terms UniProt PubMed Binding
    affinity
    98401 2op4:H (2.85) BS01 EDO ? N/A Q5BJZ2 17400249
    98402 2op9:A (1.8) BS01 WR1 2.1.1.-
    2.1.1.56
    2.1.1.57
    2.7.7.48
    2.7.7.50
    3.1.13.-
    3.4.19.12
    3.4.22.-
    3.4.22.69
    3.6.4.12
    3.6.4.13
    4.6.1.-
    GO:0008233 ... P0C6U8 17605471 BindingDB: Ki=2200nM
    98403 2op9:B (1.8) BS01 WR1 2.1.1.-
    2.1.1.56
    2.1.1.57
    2.7.7.48
    2.7.7.50
    3.1.13.-
    3.4.19.12
    3.4.22.-
    3.4.22.69
    3.6.4.12
    3.6.4.13
    4.6.1.-
    GO:0008233 ... P0C6U8 17605471 BindingDB: Ki=2200nM
    98404 2opa:A (2.4) BS01 FHC 5.3.2.6 GO:0016853 ... P70994 N/A
    98405 2opb:A (2.8) BS01 F21 2.1.1.28 GO:0004603 ... P11086 17845018 BindingDB: Ki=1200nM
    98406 2opb:A (2.8) BS02 SAH 2.1.1.28 GO:0004603 ... P11086 17845018
    98407 2opb:B (2.8) BS01 F21 2.1.1.28 GO:0004603 ... P11086 17845018 BindingDB: Ki=1200nM
    98408 2opb:B (2.8) BS02 SAH 2.1.1.28 GO:0004603 ... P11086 17845018
    98409 2opc:A (1.43) BS01 CO ? N/A Q6R661 17329816
    98410 2opf:A (1.85) BS01 dna 3.2.2.-
    4.2.99.18
    GO:0000703 ... P50465 N/A
    98411 2opf:A (1.85) BS02 dna 3.2.2.-
    4.2.99.18
    GO:0000703 ... P50465 N/A
    98412 2opf:A (1.85) BS03 ZN 3.2.2.-
    4.2.99.18
    GO:0000703 ... P50465 N/A
    98413 2oph:A (2.4) BS01 277 3.4.14.5 GO:0001618 ... P27487 17350841 MOAD: ic50=0.016uM
    BindingDB: IC50=16nM
    98414 2oph:B (2.4) BS01 277 3.4.14.5 GO:0001618 ... P27487 17350841 MOAD: ic50=0.016uM
    BindingDB: IC50=16nM
    98415 2opm:A (2.4) BS01 PO4 2.5.1.1
    2.5.1.10
    GO:0004659 ... P14324 19309137
    98416 2opm:A (2.4) BS02 PO4 2.5.1.1
    2.5.1.10
    GO:0004659 ... P14324 19309137
    98417 2opm:A (2.4) BS03 MG 2.5.1.1
    2.5.1.10
    GO:0004659 ... P14324 19309137
    98418 2opm:A (2.4) BS04 MG 2.5.1.1
    2.5.1.10
    GO:0004659 ... P14324 19309137
    98419 2opm:A (2.4) BS05 NI9 2.5.1.1
    2.5.1.10
    GO:0004659 ... P14324 19309137
    98420 2opn:A (2.7) BS01 MG 2.5.1.1
    2.5.1.10
    GO:0004659 ... P14324 N/A
    98421 2opn:A (2.7) BS02 SUF 2.5.1.1
    2.5.1.10
    GO:0004659 ... P14324 N/A BindingDB: IC50=1000nM
    98422 2opo:A (1.75) BS01 CA ? GO:0005509 ... Q84V36 18250440
    98423 2opo:A (1.75) BS02 CA ? GO:0005509 ... Q84V36 18250440
    98424 2opo:B (1.75) BS01 CA ? GO:0005509 ... Q84V36 18250440
    98425 2opo:B (1.75) BS02 CA ? GO:0005509 ... Q84V36 18250440
    98426 2opo:C (1.75) BS01 CA ? GO:0005509 ... Q84V36 18250440
    98427 2opo:C (1.75) BS02 CA ? GO:0005509 ... Q84V36 18250440
    98428 2opo:D (1.75) BS01 CA ? GO:0005509 ... Q84V36 18250440
    98429 2opo:D (1.75) BS02 CA ? GO:0005509 ... Q84V36 18250440
    98430 2opp:A (2.55) BS01 MG 2.7.7.-
    2.7.7.49
    2.7.7.7
    3.1.-.-
    3.1.13.2
    3.1.26.13
    3.4.23.16
    GO:0003676 ... P04585 17441703
    98431 2opp:A (2.55) BS02 HBQ 2.7.7.-
    2.7.7.49
    2.7.7.7
    3.1.-.-
    3.1.13.2
    3.1.26.13
    3.4.23.16
    GO:0003676 ... P04585 17441703
    98432 2opq:A (2.8) BS01 HBQ 2.7.7.-
    2.7.7.49
    2.7.7.7
    3.1.-.-
    3.1.13.2
    3.1.26.13
    3.4.23.16
    GO:0003676 ... P04585 17441703
    98433 2opr:A (2.9) BS01 HBQ 2.7.7.-
    2.7.7.49
    2.7.7.7
    3.1.-.-
    3.1.13.2
    3.1.26.13
    3.4.23.16
    GO:0003676 ... P04585 17441703
    98434 2ops:A (2.3) BS01 HBQ 2.7.7.-
    2.7.7.49
    2.7.7.7
    3.1.-.-
    3.1.13.2
    3.1.26.13
    3.4.23.16
    GO:0003676 ... P04585 17441703
    98435 2opx:A (2.53) BS01 DXC 1.2.1.21
    1.2.1.22
    GO:0004030 ... P25553 N/A
    98436 2opx:A (2.53) BS02 DXC 1.2.1.21
    1.2.1.22
    GO:0004030 ... P25553 N/A
    98437 2opx:A (2.53) BS03 DXC 1.2.1.21
    1.2.1.22
    GO:0004030 ... P25553 N/A
    98438 2opy:A (2.8) BS01 ZN 2.3.2.27 N/A P98170 17336535
    98439 2opy:A (2.8) BS02 CO9 2.3.2.27 N/A P98170 17336535
    98440 2opz:A (3.0) BS01 peptide 2.3.2.27 N/A P98170 17336535
    98441 2opz:A (3.0) BS02 ZN 2.3.2.27 N/A P98170 17336535
    98442 2opz:B (3.0) BS01 peptide 2.3.2.27 N/A P98170 17336535
    98443 2opz:B (3.0) BS02 ZN 2.3.2.27 N/A P98170 17336535
    98444 2opz:C (3.0) BS01 peptide 2.3.2.27 N/A P98170 17336535
    98445 2opz:C (3.0) BS02 ZN 2.3.2.27 N/A P98170 17336535
    98446 2opz:D (3.0) BS01 peptide 2.3.2.27 N/A P98170 17336535
    98447 2opz:D (3.0) BS02 ZN 2.3.2.27 N/A P98170 17336535
    98448 2oq1:A (1.9) BS01 peptide 2.7.10.2 GO:0004715 ... P43403 7659156
    98449 2oq2:A (2.1) BS01 A3P 1.8.4.8 GO:0000103 ... P18408 18991405
    98450 2oq2:B (2.1) BS01 A3P 1.8.4.8 GO:0000103 ... P18408 18991405
    98451 2oq2:C (2.1) BS01 A3P 1.8.4.8 GO:0000103 ... P18408 18991405
    98452 2oq2:D (2.1) BS01 A3P 1.8.4.8 GO:0000103 ... P18408 18991405
    98453 2oq4:A (2.6) BS01 dna 3.2.2.-
    4.2.99.18
    GO:0000703 ... P50465 N/A
    98454 2oq4:A (2.6) BS02 dna 3.2.2.-
    4.2.99.18
    GO:0000703 ... P50465 N/A
    98455 2oq4:A (2.6) BS03 ZN 3.2.2.-
    4.2.99.18
    GO:0000703 ... P50465 N/A
    98456 2oq4:B (2.6) BS01 dna 3.2.2.-
    4.2.99.18
    GO:0000703 ... P50465 N/A
    98457 2oq4:B (2.6) BS02 dna 3.2.2.-
    4.2.99.18
    GO:0000703 ... P50465 N/A
    98458 2oq4:B (2.6) BS03 ZN 3.2.2.-
    4.2.99.18
    GO:0000703 ... P50465 N/A
    98459 2oq5:A (1.61) BS01 BEN 3.4.21.- GO:0004252 ... Q9UL52 17388811
    98460 2oq6:A (2.0) BS01 peptide 1.14.11.66
    1.14.11.69
    N/A O75164 17589501
    98461 2oq6:A (2.0) BS02 ZN 1.14.11.66
    1.14.11.69
    N/A O75164 17589501
    98462 2oq6:B (2.0) BS01 peptide 1.14.11.66
    1.14.11.69
    N/A O75164 17589501
    98463 2oq6:B (2.0) BS02 ZN 1.14.11.66
    1.14.11.69
    N/A O75164 17589501
    98464 2oq7:A (2.15) BS01 ZN 1.14.11.66
    1.14.11.69
    N/A O75164 17589501
    98465 2oq7:B (2.15) BS01 ZN 1.14.11.66
    1.14.11.69
    N/A O75164 17589501
    98466 2oqe:A (1.6) BS01 CU 1.4.3.21 GO:0005507 ... P12807 17409383
    98467 2oqe:B (1.6) BS01 CU 1.4.3.21 GO:0005507 ... P12807 17409383
    98468 2oqe:C (1.6) BS01 CU 1.4.3.21 GO:0005507 ... P12807 17409383
    98469 2oqe:D (1.6) BS01 CU 1.4.3.21 GO:0005507 ... P12807 17409383
    98470 2oqe:E (1.6) BS01 CU 1.4.3.21 GO:0005507 ... P12807 17409383
    98471 2oqe:F (1.6) BS01 CU 1.4.3.21 GO:0005507 ... P12807 17409383
    98472 2oqi:B (2.8) BS01 GGO 3.4.14.5 GO:0001618 ... P27487 17367123 BindingDB: Ki=3.2nM
    98473 2oqj:A (2.8) BS01 peptide N/A N/A N/A 18198210
    98474 2oqj:B (2.8) BS01 peptide ? N/A Q6N089 18198210
    98475 2oqj:D (2.8) BS01 peptide N/A N/A N/A 18198210
    98476 2oqj:E (2.8) BS01 peptide ? N/A Q6N089 18198210
    98477 2oqj:G (2.8) BS01 peptide N/A N/A N/A 18198210
    98478 2oqj:H (2.8) BS01 peptide ? N/A Q6N089 18198210
    98479 2oqj:J (2.8) BS01 peptide N/A N/A N/A 18198210
    98480 2oqj:K (2.8) BS01 peptide ? N/A Q6N089 18198210
    98481 2oql:A (1.8) BS01 ZN 3.1.8.1 GO:0004063 ... P0A434 N/A
    98482 2oql:A (1.8) BS02 ZN 3.1.8.1 GO:0004063 ... P0A434 N/A
    98483 2oql:B (1.8) BS01 ZN 3.1.8.1 GO:0004063 ... P0A434 N/A
    98484 2oql:B (1.8) BS02 ZN 3.1.8.1 GO:0004063 ... P0A434 N/A
    98485 2oqr:A (2.03) BS01 LA ? GO:0000156 ... P9WGL9 17942407
    98486 2oqr:A (2.03) BS02 LA ? GO:0000156 ... P9WGL9 17942407
    98487 2oqr:A (2.03) BS03 LA ? GO:0000156 ... P9WGL9 17942407
    98488 2oqr:A (2.03) BS04 LA ? GO:0000156 ... P9WGL9 17942407
    98489 2oqs:A (-1.00) BS01 peptide ? N/A Q12959 17713926
    98490 2oqu:A (1.8) BS01 CA 3.4.21.36 GO:0004252 ... P00772 17452791
    98491 2oqv:A (2.8) BS01 MA9 3.4.14.5 GO:0001618 ... P27487 17367123 BindingDB: Ki=4.0nM
    98492 2oqy:A (2.0) BS01 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98493 2oqy:A (2.0) BS02 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98494 2oqy:B (2.0) BS01 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98495 2oqy:B (2.0) BS02 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98496 2oqy:C (2.0) BS01 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98497 2oqy:C (2.0) BS02 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98498 2oqy:D (2.0) BS01 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98499 2oqy:D (2.0) BS02 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98500 2oqy:E (2.0) BS01 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98501 2oqy:E (2.0) BS02 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98502 2oqy:F (2.0) BS01 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98503 2oqy:F (2.0) BS02 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98504 2oqy:G (2.0) BS01 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98505 2oqy:G (2.0) BS02 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98506 2oqy:H (2.0) BS01 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98507 2oqy:H (2.0) BS02 MG 4.2.1.158 GO:0003824 ... Q8EMJ9 19883118
    98508 2or1:L (2.5) BS01 dna ? GO:0003677 ... P16117 3187531
    98509 2or1:L (2.5) BS02 dna ? GO:0003677 ... P16117 3187531
    98510 2or1:R (2.5) BS01 dna ? GO:0003677 ... P16117 3187531
    98511 2or1:R (2.5) BS02 dna ? GO:0003677 ... P16117 3187531
    98512 2or4:A (1.62) BS01 ZN 3.4.17.21 GO:0004180 ... Q04609 17567119
    98513 2or4:A (1.62) BS02 ZN 3.4.17.21 GO:0004180 ... Q04609 17567119
    98514 2or4:A (1.62) BS03 CA 3.4.17.21 GO:0004180 ... Q04609 17567119
    98515 2or4:A (1.62) BS04 QUS 3.4.17.21 GO:0004180 ... Q04609 17567119 MOAD: ic50=9.5uM
    98516 2or9:H (2.7) BS01 peptide N/A N/A N/A 18473392
    98517 2or9:I (2.7) BS01 peptide N/A N/A N/A 18473392
    98518 2or9:L (2.7) BS01 peptide N/A GO:0005576 ... P01654 18473392
    98519 2or9:M (2.7) BS01 peptide N/A GO:0005576 ... P01654 18473392
    98520 2ord:A (1.4) BS01 PLP 2.6.1.11 GO:0003992 ... Q9X2A5 N/A
    98521 2ord:B (1.4) BS01 PLP 2.6.1.11 GO:0003992 ... Q9X2A5 N/A
    98522 2ore:D (2.99) BS01 SAH 2.1.1.72 GO:0003676 ... P0AEE8 17545164
    98523 2ore:E (2.99) BS01 SAH 2.1.1.72 GO:0003676 ... P0AEE8 17545164
    98524 2ore:F (2.99) BS01 SAH 2.1.1.72 GO:0003676 ... P0AEE8 17545164
    98525 2ori:A (1.8) BS01 ZN 2.7.4.3 GO:0004017 ... P16304 N/A
    98526 2ori:A (1.8) BS02 AP5 2.7.4.3 GO:0004017 ... P16304 N/A
    98527 2ori:B (1.8) BS01 ZN 2.7.4.3 GO:0004017 ... P16304 N/A
    98528 2ori:B (1.8) BS02 AP5 2.7.4.3 GO:0004017 ... P16304 N/A
    98529 2orj:A (1.8) BS01 CA ? N/A P35247 17417879
    98530 2orj:A (1.8) BS02 CA ? N/A P35247 17417879
    98531 2orj:A (1.8) BS03 CA ? N/A P35247 17417879
    98532 2orj:B (1.8) BS01 CA ? N/A P35247 17417879
    98533 2orj:B (1.8) BS02 CA ? N/A P35247 17417879
    98534 2orj:B (1.8) BS03 CA ? N/A P35247 17417879
    98535 2orj:C (1.8) BS01 CA ? N/A P35247 17417879
    98536 2orj:C (1.8) BS02 CA ? N/A P35247 17417879
    98537 2orj:C (1.8) BS03 CA ? N/A P35247 17417879
    98538 2ork:A (1.89) BS01 CA ? N/A P35247 17417879
    98539 2ork:A (1.89) BS02 CA ? N/A P35247 17417879
    98540 2ork:A (1.89) BS03 CA ? N/A P35247 17417879
    98541 2ork:B (1.89) BS01 CA ? N/A P35247 17417879
    98542 2ork:B (1.89) BS02 CA ? N/A P35247 17417879
    98543 2ork:B (1.89) BS03 CA ? N/A P35247 17417879
    98544 2ork:B (1.89) BS04 IPD ? N/A P35247 17417879 MOAD: ic50=1.4mM
    98545 2ork:C (1.89) BS01 CA ? N/A P35247 17417879
    98546 2ork:C (1.89) BS02 CA ? N/A P35247 17417879
    98547 2ork:C (1.89) BS03 CA ? N/A P35247 17417879
    98548 2ork:C (1.89) BS04 IPD ? N/A P35247 17417879 MOAD: ic50=1.4mM
    98549 2orl:A (-1.00) BS01 HEC ? GO:0005515 ... P00044 17488096
    98550 2orl:A (-1.00) BS02 4NL ? GO:0005515 ... P00044 17488096
    98551 2oro:A (2.0) BS01 HEM 1.14.13.39 GO:0004517 ... P29477 17315988
    98552 2oro:A (2.0) BS02 228 1.14.13.39 GO:0004517 ... P29477 17315988 MOAD: ic50=0.29nM
    98553 2orp:A (1.97) BS01 HEM 1.14.13.39 GO:0004517 ... P29477 17315988
    98554 2orp:A (1.97) BS02 R86 1.14.13.39 GO:0004517 ... P29477 17315988 MOAD: ic50=1.9nM
    98555 2orq:A (2.1) BS01 HEM 1.14.13.39 GO:0004517 ... P29477 17315988
    98556 2orq:A (2.1) BS02 MSR 1.14.13.39 GO:0004517 ... P29477 17315988
    98557 2orq:A (2.1) BS03 MR1 1.14.13.39 GO:0004517 ... P29477 17315988
    98558 2orr:A (2.0) BS01 HEM 1.14.13.39 GO:0004517 ... P29477 17315988
    98559 2orr:A (2.0) BS02 333 1.14.13.39 GO:0004517 ... P29477 17315988
    98560 2ors:A (2.0) BS01 HEM 1.14.13.39 GO:0004517 ... P29477 17315988
    98561 2ors:A (2.0) BS02 391 1.14.13.39 GO:0004517 ... P29477 17315988
    98562 2ort:A (1.87) BS01 HEM 1.14.13.39 GO:0004517 ... P29477 17315988
    98563 2ort:A (1.87) BS02 342 1.14.13.39 GO:0004517 ... P29477 17315988
    98564 2orv:A (2.3) BS01 ZN 2.7.1.21 GO:0004797 ... P04183 17407781
    98565 2orv:A (2.3) BS02 4TA 2.7.1.21 GO:0004797 ... P04183 17407781 MOAD: Kd=29nM
    98566 2orv:B (2.3) BS01 ZN 2.7.1.21 GO:0004797 ... P04183 17407781
    98567 2orv:B (2.3) BS02 4TA 2.7.1.21 GO:0004797 ... P04183 17407781 MOAD: Kd=29nM
    98568 2orw:A (1.5) BS01 ZN 2.7.1.21 GO:0004797 ... Q9WYN2 17407781
    98569 2orw:A (1.5) BS02 4TA 2.7.1.21 GO:0004797 ... Q9WYN2 17407781
    98570 2orw:B (1.5) BS01 ZN 2.7.1.21 GO:0004797 ... Q9WYN2 17407781
    98571 2orw:B (1.5) BS02 4TA 2.7.1.21 GO:0004797 ... Q9WYN2 17407781
    98572 2orz:A (2.15) BS01 peptide ? N/A Q9QWJ9 17405859
    98573 2os1:A (1.5) BS01 BB2 3.5.1.88 GO:0006412 ... Q82ZJ0 N/A
    98574 2os2:A (2.3) BS01 peptide 1.14.11.66
    1.14.11.69
    N/A O75164 17589501
    98575 2os2:A (2.3) BS02 ZN 1.14.11.66
    1.14.11.69
    N/A O75164 17589501
    98576 2os2:B (2.3) BS01 peptide 1.14.11.66
    1.14.11.69
    N/A O75164 17589501
    98577 2os2:B (2.3) BS02 ZN 1.14.11.66
    1.14.11.69
    N/A O75164 17589501
    98578 2os3:A (2.26) BS01 CO 3.5.1.88 GO:0006412 ... P68771 N/A
    98579 2os3:A (2.26) BS02 BB2 3.5.1.88 GO:0006412 ... P68771 N/A
    98580 2os6:A (-1.00) BS01 peptide ? N/A Q9NZN5 N/A
    98581 2os8:B (3.27) BS01 MG ? GO:0005509 ... Q26068 17502101
    98582 2os8:C (3.27) BS01 CA ? GO:0005509 ... Q26066 17502101
    98583 2os9:A (1.7) BS01 CA ? N/A P35247 17417879
    98584 2os9:A (1.7) BS02 CA ? N/A P35247 17417879
    98585 2os9:A (1.7) BS03 CA ? N/A P35247 17417879
    98586 2os9:A (1.7) BS04 INS ? N/A P35247 17417879
    98587 2os9:B (1.7) BS01 CA ? N/A P35247 17417879
    98588 2os9:B (1.7) BS02 CA ? N/A P35247 17417879
    98589 2os9:B (1.7) BS03 CA ? N/A P35247 17417879
    98590 2os9:B (1.7) BS04 INS ? N/A P35247 17417879
    98591 2os9:C (1.7) BS01 CA ? N/A P35247 17417879
    98592 2os9:C (1.7) BS02 CA ? N/A P35247 17417879
    98593 2os9:C (1.7) BS03 CA ? N/A P35247 17417879
    98594 2os9:C (1.7) BS04 INS ? N/A P35247 17417879
    98595 2osb:A (1.8) BS01 ZN 2.7.4.3 GO:0004017 ... P16304 N/A
    98596 2osb:A (1.8) BS02 AP5 2.7.4.3 GO:0004017 ... P16304 N/A
    98597 2osb:B (1.8) BS01 ZN 2.7.4.3 GO:0004017 ... P16304 N/A
    98598 2osb:B (1.8) BS02 AP5 2.7.4.3 GO:0004017 ... P16304 N/A
    98599 2osc:A (2.8) BS01 MUH 2.7.10.1 GO:0004672 ... Q02763 17350837 BindingDB: IC50=17nM
    98600 2osd:A (2.3) BS01 CA ? N/A Q58855 N/A

    Reference:
  • Chengxin Zhang, Xi Zhang, Lydia Freddolino, and Yang Zhang. BioLiP2: an updated structure database for biologically relevent ligand-protein interactions, Nucleic Acids Research, gkad630 (2023).
  • Jianyi Yang, Ambrish Roy, and Yang Zhang. BioLiP: a semi-manually curated database for biologically relevant ligand-protein interactions, Nucleic Acids Research, 41: D1096-D1103 (2013) (download the PDF file).