Chains and heterogens:
PDB Chain Sequences:
>1iarA (A:) hkcditlqeiiktlnslteqktlcteltvtdifaaskntteketfcraatvlrqfyshhe kdtrclgataqqfhrhkqlirflkrldrnlwglaglnscpvkeanqstlenflerlktim rekyskcss
>1iarB (B:) fkvlqeptcvsdymsistcewkmngptncstelrllyqlvfllseahtcipennggagcv chllmddvvsadnytldlwagqqllwkgsfkpsehvkprapgnltvhtnvsdtllltwsn pyppdnylynhltyavniwsendpadfriynvtylepslriaastlksgisyrarvrawa qaynttwsewspstkwhnsyrepfeqh
>1iarB (B:) fkvlqeptcvsdymsistcewkmngptncstelrllyqlvfllseahtcipennggagcv chllmddvvsadnytldlwagqqllwkgsfkpsehvkprapgnltvhdtllltwsnpypp dnylynhltyavniwsendpadfriynvtylepslriaagisyrarvrawaqaynttwse wspstkwh