>sp|B3PMF7|RL21_META1 Large ribosomal subunit protein bL21 OS=Metamycoplasma arthritidis GN=rplU MFAIIETGGKQIIVKAGDTIFIEKIEGKEGDKVSFDKVLAINDKIGTPYLENAAVLAAIE KQGKAKKIVVYRHNAKSTHKRKLGHRQPYTRVKILEIKEAK