Chains and heterogens:
PDB Chain Sequences:
>1byqA (A:) pmeeeevetfafqaeiaqlmsliintfysnkeiflrelisnssdaldkiryetltdpskl dsgkelhinlipnkqdrtltivdtgigmtkadlinnlgtiaksgtkafmealqagadism igqfgvgfysaylvaekvtvitkhnddeqyawessaggsftvrtdtgepmgrgtkvilhl kedqteyleerrikeivkkhsqfigypitlfve