>tr|A0A4Y6KWJ9|A0A4Y6KWJ9_9RHOO Small ribosomal subunit protein bS21 OS=Azoarcus sp. DD4 GN=rpsU MPGIRVKENEPFEVAIRRFKRTIEKTGVLTELRSREFYEKPTAERKRKLAAAVKRNHKRL RSQMLPPKLY