Chains and heterogens:
PDB Chain Sequences:
>1yu2A (A:) mstavqfrggttaqhatftgaareitvdtdkntvvvhdgataggfplarhdlvktafika dksavaftrtgnatasikagtivevngklvqftadtaitmpaltagtdyaiyvcddgtvr adsnfsaptgytsttarkvggfhyapgsnaaaqaggnttaqineyslwdikfrpaaldpr gmtlvagafwadiyllgvnhltdgtskynvtiadgsaspkkstkfggdgsaaysdgawyn faevmthhgkrlpnynefqalafgtteatssggtdvpttgvngtgatsawniftskwgvv qasgclwtwgnefggvngaseytantggrgsvyaqpaaalfggswhytsnsgsraaywys gpsnspanigargvcdhlile
>1yu2A (A:) vqfrggttaqhatftgaareitvdtdkntvvvhdgataggfplarhdlvktafikadksa vaftrtgnatasikagtivevngklvqftadtaitmpaltagtdyaiyvcddgtvradsn fsaptgytsttarkvggfhyapgsnaaaqaggnttaqineyslwdikfrpaaldprgmtl vagafwadiyllgvnhltdgtskynvtiadgsaspkkstkfggdgsaaysdgawynfaev mthhgkrlpnynefqalafgtteatssggtdvpttgvngtgatsawniftskwgvvqasg clwtwgnefggvngaseytantggrgsvyaqpaaalfggswhytsnsgsraaywysgpsn spanigargvcdhlile