3. Mechanism of action: 50S subun peptide macrolide bond 50s subunit A C cC U U A CGC G XXXXXXAUGCGCGGAUCC/ XXXXXXAUGCGCGGAUCCCCCACCUGA codon 1 codon 2 codon 3 codon 4 codon 5 codon 6 codon 7 (SER) (f-METL(ARG) (GLY) (SER) (PRO) (THR) (Stop) 30s start) 30s subunit macrolide subunit mRN3. Mechanism of action: subunit macrolide