>sp|Q21CB9|TRPB_RHOPB Tryptophan synthase beta chain OS=Rhodopseudomonas palustris GN=trpB MTTQLPNSFRSGPDERGHFGIFGGRFVAETLMPLILDLEKAYAGAKADPSFQREMDGYLK DYVGRPSPLYFAERLTDHLGGAKIYFKREELNHTGSHKVNNVLGQIMVARRMGKKRIIAE TGAGQHGVATATLCARFGLECIVFMGAVDVERQQPNVIRMQMLGAKVVPVQSGARTLKDA MNEALRDWVTNVSDTFYCIGTAAGPHPYPMMVRDFQSIIGTETKTQMQAAEGRLPDSLVA CIGGGSNALGLFHPFLDDPTVEIFGVEAAGHGLTQLHAASIAGGRPGVLHGNRTYLLMDD DGQIQEGHSISAGLDYPGIGPEHSWLHETGRVTYLSATDDEALAAFQLLSRLEGIIPALE PAHAIAKVLELAPQRPKDHLMVINLSGRGDKDIPQVAEILRGQK