Chains and heterogens:
PDB Chain Sequences:
>1bupA (A:) mskgpavgidlgstyscvgvfqhgkveiiandqgnrttpsyvaftdterligdaaknqva mnptntvfdakrligrrfddavvqsdmkhwpfmvvndagrpkvqveykgetksfypeevs smvltkmkeiaeaylgktvtnavvtvpayfndsqrqatkdagtiaglnvlriineptaaa iaygldkkvgaernvlifdlgggtfdvsiltiedgifevkstagdthlggedfdnrmvnh fiaefkrkhkkdisenkravrrlrtacerakrtlssstqasieidslyegidfytsitra rfeelnadlfrgtldpvekalrdakldksqihdivlvggstripkiqkllqdffngkeln ksinpdeavaygaavqaailsgdkse
>1bupA (A:) gpavgidlgstyscvgvfqhgkveiiandqgnrttpsyvaftdterligdaaknqvamnp tntvfdakrligrrfddavvqsdmkhwpfmvvndagrpkvqveykgetksfypeevssmv ltkmkeiaeaylgktvtnavvtvpayfndsqrqatkdagtiaglnvlriineptaaaiay gldkkvgaernvlifdlgggtfdvsiltiedgifevkstagdthlggedfdnrmvnhfia efkrkhkkdisenkravrrlrtacerakrtlssstqasieidslyegidfytsitrarfe elnadlfrgtldpvekalrdakldksqihdivlvggstripkiqkllqdffngkelnksi npdeavaygaavqaails