>tr|A0A3N1RCD7|A0A3N1RCD7_9GAMM Small ribosomal subunit protein bS21 OS=Marinobacter sp. 3-2 GN=rpsU MPAVKVKENEPFDVALRRFKRSCEKAGVLSEVRRREHYEKPTAVRKRKAAAAVKRHLKKL QREQRKFERLY