Chains and heterogens:
PDB Chain Sequences:
>1hchA (A:) qltptfydnscpnvsnivrdtivnelrsdpriaasilrlhfhdcfvngcdasilldntts frtekdafgnansargfpvidrmkaavesacprtvscadlltiaaqqsvtlaggpswrvp lgrrdslqafldlananlpapfftlpqlkdsfrnvglnrssdlvalsgghtfgknqcrfi mdrlynfsntglpdptlnttylqtlrglcplngnlsalvdfdlrtptifdnkyyvnleeq kgliqsdqelfsspnatdtiplvrsfanstqtffnafveamdrmgnitpltgtqgqirln crvvns