Chains and heterogens:
PDB Chain Sequences:
>1stcE (E:) gnaaaakkgseqesvkeflakakedflkkwenpaqntahldqferiktlgtgsfgrvmlv khmetgnhyamkildkqkvvklkqiehtlnekrilqavnfpflvklefsfkdnsnlymvm eyvpggemfshlrrigrfsepharfyaaqivltfeylhsldliyrdlkpenllidqqgyi qvtdfgfakrvkgrtwtlcgtpeylapeiilskgynkavdwwalgvliyemaagyppffa dqpiqiyekivsgkvrfpshfssdlkdllrnllqvdltkrfgnlkngvndiknhkwfatt dwiaiyqrkveapfipkfkgpgdtsnfddyeeeeirvsinekcgkefsef
>1stcE (E:) vkeflakakedflkkwenpaqntahldqferiktlgtgsfgrvmlvkhmetgnhyamkil dkqkvvklkqiehtlnekrilqavnfpflvklefsfkdnsnlymvmeyvpggemfshlrr igrfsepharfyaaqivltfeylhsldliyrdlkpenllidqqgyiqvtdfgfakrvkgr twtlcgtpeylapeiilskgynkavdwwalgvliyemaagyppffadqpiqiyekivsgk vrfpshfssdlkdllrnllqvdltkrfgnlkngvndiknhkwfattdwiaiyqrkveapf ipkfkgpgdtsnfddyeeeeirvsinekcgkefsef