>tr|A0A1E7RLB9|A0A1E7RLB9_9GAMM Small ribosomal subunit protein bS21 OS=Stenotrophomonas sp. BIIR7 GN=rpsU MPSVKVRENEPFEFALRRFKRTCEKAGVLAETRKREFYEKPTQERKRKAAAAVKRQLRRS SRDVTKRQRLY