>tr|A0A0Q4RTB4|A0A0Q4RTB4_9BURK Small ribosomal subunit protein bS21 OS=Acidovorax sp. Leaf78 GN=rpsU MTTIRVKENEPFDVALRRFKRTIEKLGLLTDLRAREFYEKPTAERKRKKAAAVKRHYKRV RSMQLPKKLY