Chains and heterogens:
PDB Chain Sequences:
>1b8nA (A:) mqngytyedyqdtakwllshteqrpqvavicgsglgglvnkltqaqtfdyseipnfpest vpghagrlvfgilngracvmmqgrfhmyegypfwkvtfpvrvfrllgvetlvvtnaaggl npnfevgdimlirdhinlpgfsgenplrgpneerfgvrfpamsdaydrdmrqkahstwkq mgeqrelqegtyvmlggpnfetvaecrllrnlgadavgmstvpevivarhcglrvfgfsl itnkvimdyesqgkanheevleagkqaaqkleqfvsllmasipv
>1b8nA (A:) qngytyedyqdtakwllshteqrpqvavicgsglgglvnkltqaqtfdyseipnfpestv pghagrlvfgilngracvmmqgrfhmyegypfwkvtfpvrvfrllgvetlvvtnaaggln pnfevgdimlirdhinlpgfsgenplrgpneerfgvrfpamsdaydrdmrqkahstwkqm geqrelqegtyvmlggpnfetvaecrllrnlgadavgmstvpevivarhcglrvfgfsli tnkvimdyesqgkanheevleagkqaaqkleqfvsllm