Chains and heterogens:
PDB Chain Sequences:
>3ertA (A:) mdpmikrskknslalsltadqmvsalldaeppilyseydptrpfseasmmglltnladre lvhminwakrvpgfvdltlhdqvhllecawleilmiglvwrsmehpgkllfapnllldrn qgkcvegmveifdmllatssrfrmmnlqgeefvclksiillnsgvytflsstlksleekd hihrvldkitdtlihlmakagltlqqqhqrlaqlllilshirhmsnkgmehlysmkcknv vplydlllemldahrlhapts
>3ertA (A:) lalsltadqmvsalldaeppilyseydptrpfseasmmglltnladrelvhminwakrvp gfvdltlhdqvhllecawleilmiglvwrsmehpgkllfapnllldrnqgkcvegmveif dmllatssrfrmmnlqgeefvclksiillnsgvytflsstlksleekdhihrvldkitdt lihlmakagltlqqqhqrlaqlllilshirhmsnkgmehlysmkcknvvplydlllemld ahrlhap