>tr|A0A0R0C8P3|A0A0R0C8P3_9GAMM Small ribosomal subunit protein bS21 OS=Stenotrophomonas terrae GN=rpsU MPSVKVRENEPFEFALRRFKRTCEKAGVLAETRKREFYEKPTQERKRKAAAAVKRQLRRS SRDVTKRQRLY