>tr|A0A015YEK9|A0A015YEK9_BACFG Small ribosomal subunit protein bS21 OS=Bacteroides fragilis str. 2-F-2 #4 GN=rpsU MIVVPVKEGENIEKALKKFKRKFEKTGIVKELRSRQQFDKPSVTKRLKKERAVYVQKLQQ VED