>tr|A0A9Q9B314|A0A9Q9B314_9SPIR Small ribosomal subunit protein bS21 OS=Treponema sp. OMZ 789 GN=rpsU MAYVTIDDSEHLEKALKRFKRQVEKEGIIREWKKKEFYEKPSTVLNRKNKALRRKLMKKT RRSRDSKSY