Chains and heterogens:
PDB Chain Sequences:
>1ai3_ (-) meskvvvpaqgkkitlqngklnvpenpiipyiegdgigvdvtpamlkvvdaavekaykge rkiswmeiytgekstqvygqdvwlpaetldlireyrvaikgplttpvgggirslnvalrq eldlyiclrpvryyqgtpspvkhpeltdmvifrensediyagiewkadsadaekvikflr eemgvkkirfpehcgigikpcseegtkrlvraaieyaiandrdsvtlvhkgnimkftega fkdwgyqlareefggelidggpwlkvknpntgkeivikdviadaflqqillrpaeydvia cmnlngdyisdalaaqvggigiapganigdecalfeathgtapkyagqdkvnpgsiilsa emmlrhmgwteaadlivkgmegainaktvtydferlmdgakllkcsefgdaiienm
>1ai3_ (-) skvvvpaqgkkitlqngklnvpenpiipyiegdgigvdvtpamlkvvdaavekaykgerk iswmeiytgekstqvygqdvwlpaetldlireyrvaikgplttpvgggirslnvalrqel dlyiclrpvryyqgtpspvkhpeltdmvifrensediyagiewkadsadaekvikflree mgvkkirfpehcgigikpcseegtkrlvraaieyaiandrdsvtlvhkgnimkftegafk dwgyqlareefggelidggpwlkvknpntgkeivikdviadaflqqillrpaeydviacm nlngdyisdalaaqvggigiapganigdecalfeathgtapkyagqdkvnpgsiilsaem mlrhmgwteaadlivkgmegainaktvtydferlmdgakllkcsefgdaiienm