>tr|A0A2T9VBW0|A0A2T9VBW0_9ENTR Small ribosomal subunit protein bS21 OS=Enterobacter sp. HN503E2II GN=rpsU MPVIKVRENEPFDVALRRFKRSCEKAGVLAEVRRREFYEKPTTERKRAKASAVKRHAKKL ARENARRTRLY