Chains and heterogens:
PDB Chain Sequences:
>1iy7A (A:) arstntfnyatyhtldeiydfmdllvaqhpelvsklqigrsyegrpiyvlkfstggsnrp aiwidlgihsrewitqatgvwfakkftenygqnpsftaildsmdifleivtnpngfafth senrlwrktrsvtssslcvgvdanrnwdagfgkagassspcsetyhgkyansevevksiv dfvknhgnfkaflsihsysqlllypygyttqsipdktelnqvaksavaalkslygtsyky gsiittiyqasggsidwsynqgikysftfelrdtgrygfllpasqiiptaqetwlgvlti mehtvnn