>sp|B4RZH5|RL21_ALTMD Large ribosomal subunit protein bL21 OS=Alteromonas mediterranea GN=rplU1 MYAVFQSGGKQHRVAEGQTVRLEKIEVAPGETVEFDKVLMVSNGDDVKIGTPIVAGGKVT AEVVTHGRGDKVKIVKFRRRKHSRKQAGHRQWFTEVKITGINA