Chains and heterogens:
PDB Chain Sequences:
>3d31A (A:) mieieslsrkwknfsldnlslkvesgeyfvilgptgagktlfleliagfhvpdsgrilld gkdvtdlspekhdiafvyqnyslfphmnvkknlefgmrmkkikdpkrvldtardlkiehl ldrnpltlsggeqqrvalaralvtnpkillldeplsaldprtqenaremlsvlhkknklt vlhithdqtearimadriavvmdgkliqvgkpeeifekpvegrvasfvgfenvlkgrvis aeqgllrirvgevvidaagdmevgdqvyaflrpenialsksstqssirnslqgrvteawv lgalvrvkvdcgvplnvlitrrsaeemelspgvqiyarfkassvhvlr
>3d31B (B:) mieieslsrkwknfsldnlslkvesgeyfvilgptgagktlfleliagfhvpdsgrilld gkdvtdlspekhdiafvyqnyslfphmnvkknlefgmrmkkikdpkrvldtardlkiehl ldrnpltlsggeqqrvalaralvtnpkillldeplsaldprtqenaremlsvlhkknklt vlhithdqtearimadriavvmdgkliqvgkpeeifekpvegrvasfvgfenvlkgrvis aeqgllrirvgevvidaagdmevgdqvyaflrpenialsksstqssirnslqgrvteawv lgalvrvkvdcgvplnvlitrrsaeemelspgvqiyarfkassvhvlr
>3d31C (C:) mghhhhhhhhhhssgenlyfqghmkaknrktrkfepltfvfsflllvlflfifltlsnmi feqitedfsglvkaagnrsvissiflslyagflatllalllgaptgyilarfdfpgkrlv esiidvpvvvphtvagialltvfgsrgligeplesyiqfrdalpgivvamlfvsmpylan saregfksvdprlenaarslgaplwkafffvtlplsarylligsvmtwaraisefgavvi layypmvgptliydrfisyglsasrpiavllilvtlsiflvirtlsagwsiydrd
>3d31C (C:) pltfvfsflllvlflfifltlsnmifeqitedfsglvkaagnrsvissiflslyagflat llalllgaptgyilarfdfpgkrlvesiidvpvvvphtvagialltvfgsrgligeples yiqfrdalpgivvamlfvsmpylansaregfksvdprlenaarslgaplwkafffvtlpl sarylligsvmtwaraisefgavvilayypmvgptliydrfisyglsasrpiavllilvt lsiflvir
>3d31D (D:) mghhhhhhhhhhssgenlyfqghmkaknrktrkfepltfvfsflllvlflfifltlsnmi feqitedfsglvkaagnrsvissiflslyagflatllalllgaptgyilarfdfpgkrlv esiidvpvvvphtvagialltvfgsrgligeplesyiqfrdalpgivvamlfvsmpylan saregfksvdprlenaarslgaplwkafffvtlplsarylligsvmtwaraisefgavvi layypmvgptliydrfisyglsasrpiavllilvtlsiflvirtlsagwsiydrd
>3d31D (D:) pltfvfsflllvlflfifltlsnmifeqitedfsglvkaagnrsvissiflslyagflat llalllgaptgyilarfdfpgkrlvesiidvpvvvphtvagialltvfgsrgligeples yiqfrdalpgivvamlfvsmpylansaregfksvdprlenaarslgaplwkafffvtlpl sarylligsvmtwaraisefgavvilayypmvgptliydrfisyglsasrpiavllilvt lsiflvir