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