targeted_by targeted_by_antibiotic targeted_by targeted_by_antibiotic pulvomycin protein synthesis machinery targeted by antibiotic elongation factor Tu ARO:3000731 EF-Tu antibiotic_resistance Elongation factor Tu is required for peptide elongation in bacterial protein synthesis. elfamycin antibiotic GE2270A enacyloxin IIa kirromycin-like antibiotics LFF571