>tr|A0A2R4EYN1|A0A2R4EYN1_9BURK Small ribosomal subunit protein bS21 OS=Paracidovorax avenae GN=rpsU MTTIRVKENEPFDVALRRFKRTIEKLGLLTDLRAREFYEKPTAERKRKKAAAVKRHYKRV RSMQLPKKLY