>tr|A0A2R7QVW7|A0A2R7QVW7_9GAMM Small ribosomal subunit protein bS21 OS=Stenotrophomonas sp. HMWF003 GN=rpsU MPSVKVRENEPFEFALRRFKRTCEKAGVLAETRKREFYEKPTQERKRKAAAAVKRQLRRS SRDVTKRQRLY