- The pair of arginine codons AGA AGG close to the initiation codon of the lambda int gene inhibits cell growth and protein synthesis by accumulating peptidyl-tRNAArg4. Olivares-Trejo, J.J., Bueno-Martínez, J.G., Guarneros, G., Hernández-Sánchez, J. Mol. Microbiol. (2003)