Chains and heterogens:
PDB Chain Sequences:
>1s77D (D:) mntiniakndfsdielaaipfntladhygerlareqlalehesyemgearfrkmferqlk agevadnaaakplittllpkmiarindwfeevkakrgkrptafqflqeikpeavayitik ttlacltsadnttvqavasaigraiedearfgrirdleakhfkknveeqlnkrvghvykk afmqvveadmlskgllggeawsswhkedsihvgvrciemliestgmvslhrqnagvvgqd setielapeyaeaiatragalagispmfqpcvvppkpwtgitgggywangrrplalvrth skkalmryedvympevykainiaqntawkinkkvlavanvitkwkhcpvedipaiereel pmkpedidmnpealtawkraaaavyrkdkarksrrislefmleqankfanhkaiwfpynm dwrgrvyavsmfnpqgndmtkglltlakgkpigkegyywlkihgancagvdkvpfperik fieenhenimacaksplentwwaeqdspfcflafcfeyagvqhhglsyncslplafdgsc sgiqhfsamlrdevggravnllpsetvqdiygivakkvneilqadaingtdnevvtvtde ntgeisekvklgtkalagqwlaygvtrsvtkrsvmtlaygskefgfrqqvledtiqpaid sgkglmftqpnqaagymakliwesvsvtvvaaveamnwlksaakllaaevkdkktgeilr krcavhwvtpdgfpvwqeykkpiqtrlnlmflgqfrlqptintnkdseidahkqesgiap nfvhsqdgshlrktvvwahekygiesfalihdsfgtipadaanlfkavretmvdtyescd vladfydqfadqlhesqldkmpalpakgnlnlrdilesdfafa
>1s77D (D:) sdielaaipfntladhygerlareqlalehesyemgearfrkmferqlkagevadnaaak plittllpkmiarindwfeevkakrgkrptafqflqeikpeavayitikttlacltsadn ttvqavasaigraiedearfgrirdleakhfkknveeqlnkrvghvykkafmqvveadml skgawsswhkedsihvgvrciemliestgmvslhsetielapeyaeaiatragalagisp mfqpcvvppkpwtgitgggywangrrplalvrthskkalmryedvympevykainiaqnt awkinkkvlavanvitkwkhcpvedipaiereelpwkraaaavyrkdkarksrrislefm leqankfanhkaiwfpynmdwrgrvyavsmfnpqgndmtkglltlakgkpigkegyywlk ihgancagvdkvpfperikfieenhenimacaksplentwwaeqdspfcflafcfeyagv qhhglsyncslplafdgscsgiqhfsamlrdevggravnllpsetvqdiygivakkvnei lqadaingtdnevvklgtkalagqwlaygvtrsvtkrsvmtlaygskefgfrqqvledti qpaidsgkglmftqpnqaagymakliwesvsvtvvaaveamnwlksaakllaaevkdkkt geilrkrcavhwvtpdgfpvwqeykkpiqtrlnlmflgqfrlqptintnkdseidahkqe sgiapnfvhsqdgshlrktvvwahekygiesfalihdsfgtipadaanlfkavretmvdt yescdvladfydqfadqlhesqldkmpalpakgnlnlrdilesdfafa