vla:GKR41_00539 K04085 tRNA 2-thiouridine synthesizing protein A [EC:2.8.1.-] | (GenBank) tusA; Sulfur carrier protein TusA vla:GKR41_00538 K00963 UTP--glucose-1-phosphate uridylyltransferase [EC:2.7.7.9] | (GenBank) gtaB; UTP--glucose-1-phosphate uridylyltransferase