>tr|A0A3S0AXW5|A0A3S0AXW5_9BURK Small ribosomal subunit protein bS21 OS=Variovorax sp. 679 GN=rpsU MTTIRVKENEPFDVALRRFKRTIEKLGLLTDLRAREFYEKPTAERKRKKAAAVKRHYKRV RSMQLPKKLY