>tr|A0A1B7HV29|A0A1B7HV29_9ENTR Small ribosomal subunit protein bS21 OS=Buttiauxella gaviniae ATCC 51604 GN=rpsU MPVIKVRENEPFDVALRRFKRSCEKAGVLAEVRRREFYEKPTTERKRAKASAVKRHAKKL ARENARRTRLY