Chains and heterogens:
PDB Chain Sequences:
>1y4kA (A:) mfsaghkikgtvvlmpknelevnpdgsavdnlnaflgrsvslqlisatkadahgkgkvgk dtflegintslptlgagesafnihfewdgsmgipgafyiknymqvefflksltleaisnq gtirfvcnswvyntklyksvriffanhtyvpsetpaplvsyreeelkslrgngtgerkey driydydvyndlgnpdkseklarpvlggsstfpyprrgrtgrgptvtdpntekqgevfyv prdenlghlkskdaleigtkslsqivqpafesafdlkstpiefhsfqdvhdlyeggiklp rdvistiiplpvikelyrtdgqhilkfpqphvvqvsqsawmtdeefaremiagvnpcvir gleefppksnldpaiygdqsskitadsldldgytmdealgsrrlfmldyhdifmpyvrqi nqlnsaktyatrtilflredgtlkpvaielslphsagdlsaavsqvvlpakegvestiwl lakayvivndscyhqlmshwlnthaamepfviathrhlsvlhpiyklltphyrnnmnina larqslinangiiettflpskysvemssavyknwvftdqalpadlikrgvaikdpstphg vrlliedypyaadgleiwaaiktwvqeyvplyyardddvkndselqhwwkeavekghgdl kdkpwwpklqtledlvevcliiiwiasalhaavgfgqypygglimnrptasrrllpekgt peyeeminnhekaylrtitsklptlislsvieilsthasdevylgqrdnphwtsdskalq afqkfgnklkeieeklvrrnndpslqgnrlgpvqlpytllypsseegltfrgipnsisi
>1y4kA (A:) hkikgtvvlmpknnlnaflgrsvslqlisatkadahgkgkvgkdtflegintslptlgag esafnihfewdgsmgipgafyiknymqvefflksltleagtirfvcnswvyntklyksvr iffanhtyvpsetpaplvsyreeelkslrgngtgerkeydriydydvyndlgnpdksekl arpvlggsstfpyprrgrtgrgptvtdpntekqgevfyvprdenlghlkskdaleigtks lsqivqpafesafdlkstpiefhsfqdvhdlyeggiklprdvistiiplpvikelyrtdg qhilkfpqphvvqvsqsawmtdeefaremiagvnpcvirgleefppksnldpaiygdqss kitadsldldgytmdealgsrrlfmldyhdifmpyvrqinqlnsaktyatrtilflredg tlkpvaielslphsagdlsaavsqvvlpakegvestiwllakayvivndscyhqlmshwl nthaamepfviathrhlsvlhpiyklltphyrnnmninalarqslinangiiettflpsk ysvemssavyknwvftdqalpadlikrgvaikdpstphgvrlliedypyaadgleiwaai ktwvqeyvplyyardddvkndselqhwwkeavekghgdlkdkpwwpklqtledlvevcli iiwiasalhaavgfgqypygglimnrptasrrllpekgtpeyeeminnhekaylrtitsk lptlislsvieilsthasdevylgqrdnphwtsdskalqafqkfgnklkeieeklvrrnn dpslqgnrlgpvqlpytllypsseegltfrgipnsisi