>tr|A0A239Q9S7|A0A239Q9S7_9GAMM Small ribosomal subunit protein bS21 OS=Stenotrophomonas sp. CC120222-04 GN=rpsU MPSVKVRENEPFEFALRRFKRTCEKAGVLAETRKREFYEKPTQERKRKAAAAVKRQLRRS SRDVTKRQRLY