Chains and heterogens:
PDB Chain Sequences:
>4ex4A (A:) gpgsmtdrvsagnlrvarvlydfvnnealpgtdinpnsfwsgvakvvadltpqnqsllns rdelqaqidkwhrhrviepfdvdayrqflidigyllpepddftistsgvddeitmtagpq lvvpvlnarfalnaanarwgslydalygtdtipetegaekgseynkirgdkviayarkfm dqavplasdswtnatgvsifdgqlqiaigtnstglaspekfvgynrqlrssnwsvllanh glhievlidpespigktdpvgikdvilesaittimdfedsvtavdaddkvrgyrnwlgln kgdlteevnkdgktftrvlnadrsyttpdggeltlpgrsllfvrnvghlttsdailvdgg dgqekevfegiidavftglaaihglktgeangpltnsrtgsiyivkpkmhgpaevaftce lfsrvedvlglpqgtlkvgimdeerrttlnlkacikaaadrvvfintgfldrtgdeihts meagpmirkgamknstwikayedanvdiglaagfkgkaqigkgmwamtelmadmveqkig qpkagattawvpsptaatlhamhyhqvdvaavqqeltgqrratvdqlltiplakklawap eeireevdndcqsilgyvvrwvdqgigcskvpdihnvalmedratlrissqllanwlrhg vitsedvraslermaplvdqqnaedpayrpmapnfddsiaflaaqelilsgaqqpngyte pilhrrrrefkaqnr
>4ex4A (A:) drvsagnlrvarvlydfvnnealpgtdinpnsfwsgvakvvadltpqnqsllnsrdelqa qidkwhrhrvifdvdayrqflidigyllpepddftistsgvddeitmtagpqlvvpvlna rfalnaanarwgslydalygtdtipeteseynkirgdkviayarkfmdqavplasswtna tgvsqlqiaaspekfvgynvllanhglhievlikdvilesaittimdfedsvtavdaddk vrgyrnwlglnkgdlteevnkdgktftrvlnadrsyttpdggeltlpgrsllfvrnvghl ttsdailvdggdgqekevfegiidavftglaaihglktgeangpltnsrtgsiyivkpkm hgpaevaftcelfsrvedvlglpqgtlkvgimdeerrttlnlkacikaaadrvvfintgf ldrtgdeihtsmeagpmirkgamknstwikayedanvdiglaagfkgkaqigkgmwamte lmadmveqkigqpkagattawvpsptaatlhamhyhqvdvaavqqeltgqrratvdqllt iplakklawapeeireevdndcqsilgyvvrwvdqgigcskvpdihnvalmedratlris sqllanwlrhgvitsedvraslermaplvdqqnaedpayrpmapnfddsiaflaaqelil sgaqqpngytepilhrrrrefkaq
>4ex4B (B:) gpgsmtdrvsagnlrvarvlydfvnnealpgtdinpnsfwsgvakvvadltpqnqsllns rdelqaqidkwhrhrviepfdvdayrqflidigyllpepddftistsgvddeitmtagpq lvvpvlnarfalnaanarwgslydalygtdtipetegaekgseynkirgdkviayarkfm dqavplasdswtnatgvsifdgqlqiaigtnstglaspekfvgynrqlrssnwsvllanh glhievlidpespigktdpvgikdvilesaittimdfedsvtavdaddkvrgyrnwlgln kgdlteevnkdgktftrvlnadrsyttpdggeltlpgrsllfvrnvghlttsdailvdgg dgqekevfegiidavftglaaihglktgeangpltnsrtgsiyivkpkmhgpaevaftce lfsrvedvlglpqgtlkvgimdeerrttlnlkacikaaadrvvfintgfldrtgdeihts meagpmirkgamknstwikayedanvdiglaagfkgkaqigkgmwamtelmadmveqkig qpkagattawvpsptaatlhamhyhqvdvaavqqeltgqrratvdqlltiplakklawap eeireevdndcqsilgyvvrwvdqgigcskvpdihnvalmedratlrissqllanwlrhg vitsedvraslermaplvdqqnaedpayrpmapnfddsiaflaaqelilsgaqqpngyte pilhrrrrefkaqnr
>4ex4B (B:) drvsagnlrvarvlydfvnnealpgtdinpnsfwsgvakvvadltpqnqsllnsrdelqa qidkwhrhrviepfdvdayrqflidigyllpepddftistsgvddeitmtagpqlvvpvl narfalnaanarwgslydalygtdtipetegaekgseynkirgdkviayarkfmdqavpl asdswtnatgvsifdgqlqiaigtnstglaspekfvgynrsnwsvllanhglhievlidp espigktdpvgikdvilesaittimdfedsvtavdaddkvrgyrnwlglnkgdlteevnk dgktftrvlnadrsyttpdggeltlpgrsllfvrnvghlttsdailvddgqekevfegii davftglaaihglktgeangpltnsrtgsiyivkpkmhgpaevaftcelfsrvedvlglp qgtlkvgimdeerrttlnlkacikaaadrvvfintgfldrtgdeihtsmeagpmirkgam knstwikayedanvdiglaagfkgkaqigkgmwamtelmadmveqkigqpkagattawvp sptaatlhamhyhqvdvaavqqeltgqrratvdqlltiplakklawapeeireevdndcq silgyvvrwvdqgigcskvpdihnvalmedratlrissqllanwlrhgvitsedvrasle rmaplvdqqnaedpayrpmapnfddsiaflaaqelilsgaqqpngytepilhrrrrefka q