Chains and heterogens:
PDB Chain Sequences:
>1csr_ (-) stnlkdvlaslipkeqariktfrqqhgntavgqitvdmsyggmrgmkgliyetsvldpde girfrgfsipecqkllpkagggeeplpeglfwllvtgqiptpeqvswvskewakraalps hvvtmldnfptnlhpmsqlsaaitalnsesnfarayaeginrtkywefvyedamdliakl pcvaakiyrnlyragssigaidskldwshnftnmlgytdpqftelmrlyltihsdheggn vsahtshlvgsalsdpylsfaaamnglagplhglanqevllwlsqlqkdlgadasdeklr dyiwntlnsgrvvpgyghavlrktdprytcqrefalkhlpsdpmfklvaqlykivpnvll eqgkaknpwpnvdahsgvllqyygmtemnyytvlfgvsralgvlaqliwsralgfplerp ksmstagleklsagg