>tr|A0A1V0RGH7|A0A1V0RGH7_9BACT Small ribosomal subunit protein bS21 OS=Campylobacter helveticus GN=rpsU MPGIKVHPNESFDEAYRKFKKQVDRNLVVTEVRARRFFEPMTEIRKKQKISARKKMLKRL YMLRRYESRL