Chains and heterogens:
PDB Chain Sequences:
>1m83A (A:) mktifsgiqpsgvitignyigalrqfvelqheyncyfcivdqhaitvwqdphelrqnirr laalylavgidptqatlfiqsevpahaqaawmlqcivyigelermtqfkeksagkeavsa glltypplmaadillyntdivpvgedqkqhieltrdlaerfnkrygelftipearipkvg arimslvdptkkmsksdpnpkayitllddaktiekkiksavtdsegtirydkeakpgisn llniystlsgqsieelerqyegkgygvfkadlaqvvietlrpiqeryhhwmeseeldrvl degaekanrvasemvrkmeqamglgrrr