>sp|Q9X4E8|TRPA_CERS4 Tryptophan synthase alpha chain OS=Cereibacter sphaeroides GN=trpA MTRIDDTFRRLRAEGKKAFVAYIMAGDPDLETSLAVMRGLPEAGVDIIELGMPFTDPMAD GPTIQTAGQRALEGGQTLTRTLEMVRAFRAENAETPIVMMGYYNPIYARGVETFLAEATE AGIDGLIVVDLPPEEDAELCLPAQAAGLNFIRLATPTTDSRRLPKVLQNTSGFVYYVSIT GITGAAAAQAADVAPEVARIKAATDLPVIVGFGITTPEAAQDLAGIADGCVVGSAIVKLV GEGRPVAEVLDRVAALAAGAHAA