>pdb|2vsu|A B D MSTYEGRWKTVKVEIEDGIAFVILNRPEKRNAMSPTLNREMIDVLETLEQDPAAGVLVLTGAGEAWTAGMDLKEYFREVDAGPEILQEKIRREASQWQWKLLRMYAKPTIAMVNGWCFGGGFAPLVACDLAICADEATFGLSEINWGIPPGNLVSKAMADTVGHRQSLYYIMTGKTFGGQKAAEMGLVNESVPLAQLREVTIELARNLLEKNPVVLRAAKHGFKRCRELTWEQNEDYLYAKLDQSRLLDTEGGREQGMKQFLDDKSIKPGLQAYKR