>tr|A0A1H7TSB4|A0A1H7TSB4_9BURK Small ribosomal subunit protein bS21 OS=Variovorax sp. YR750 GN=rpsU MTTIRVKENEPFDVALRRFKRTIEKLGLLTDLRAREFYEKPTAERKRKKAAAVKRHYKRV RSMQLPKKLY