Chains and heterogens:
PDB Chain Sequences:
>1aat_ (-) aasifaavprappvavfkltadfredgdsrkvnlgvgayrtdegqpwvlpvvrkveqlia gngslnheylpilglpefranasrialgddspaiaqkrvgsvqglggtgalrigaeflrr wyngnnntatpvyvssptwenhnsvfmdagfkdirtyrywdaakrgldlqgllsdmekap efsifilhacahnptgtdptpdewkqiaavmkrrclfpffdsayqgfasgnlekdawavr yfvsegfelfcaqsfsknfglynervgnlsvvgkdednvqrvlsqmekivrttwsnppsq garivattltspqlfaewkdnvktmadrvllmrselrsrleslgtpgtwnhitdqigmfs ftglnpkqveymikekhiylmasgrinmcglttknldyvaksiheavtkiq