Chains and heterogens:
PDB Chain Sequences:
>1p50A (A:) vdqatldkleagfkklqeasdcksllkkhltkdvfdsiknkktgmgatlldviqsgvenl dsgvgiyapdaesyrtfgplfdpiiddyhggfkltdkhppkqwgdintlvgldpagqfii strvrcgrslqgypfnpcltaeqykemeekvsstlssmedelkgtyypltgmskatqqql iddhflfkegdrflqtanacrywptgrgifhndaktflvwvneqdhlriismqkggdlkt vykrlvtavdniesklpfshddrfgfltfcptnlgttmrasvhiqlpklakdrkvledia skfnlqvrgtrgehteseggvydisnkrrlglteyqavremqdgilemikmekaaa