>sp|Q9HSB9|TRPA_HALSA Tryptophan synthase alpha chain OS=Halobacterium salinarum GN=trpA MTRSDLAAAFDDGPALVSYVVAGDPTPAATAEYIDALVDGGTDVIELGLPFSEPVAEGTT IQNAIKRALDAGMTPDAYLDLVARIDADVPVVCMTYYNLLFQYGDRAGPAAFVSAAAEAG VSGFVVPDLPVDESGPLREACRAHGLDLVFVVAPTTTADRRERMLDLTTGFVYVQGRVGT TGAREEVSAATPDALAALQHTDIPKAVGFGVSSGEQAREITASGADGVIVGSAYVDTVAD GVADDDPPSVVADRLRDLAAELKAGAARGVPEPEHK