>tr|A0A1X9SZK4|A0A1X9SZK4_9BACT Small ribosomal subunit protein bS21 OS=Campylobacter sp. RM8964 GN=rpsU MPGVKVHPNESFDEAYRRFKKQTDRNLVVTEVRARRFFEPMTEIRKKQKISARKKMLKRL YMLRRYESRL