Chains and heterogens:
PDB Chain Sequences:
>1knfA (A:) sirslgymgfavsdvaawrsfltqklglmeagttdngdlfridsrawriavqqgevddla fagyevadaaglaqmadklkqagiavttgdaslarrrgvtglitfadpfglpleiyygas evfekpflpgaavsgfltgeqglghfvrcvpdsdkalafytdvlgfqlsdvidmkmgpdv tvpayflhcnerhhtlaiaafplpkrihhfmlevaslddvgfafdrvdadglitstlgrh tndhmvsfyastpsgveveygwsartvdrswvvvrhdspsmwghksvr