>sp|B4SP12|RL21_STRM5 Large ribosomal subunit protein bL21 OS=Stenotrophomonas maltophilia GN=rplU MYAVLVTGGKQYRVAQGEKLRIEKLEVEVGSEIKFDNILLLGDSDGIKIGDALSGAAVTA TVLSQGRADKVRIIKFRRRKHHMKRQGHRQYYTEIEITGIAGGSK