Structural genes lacz lacy lacA Transcription Polycistronic mRNA Ribosome Translation Moves along mRNA Proteins B-galactosidase Permease Acetylase The structural genes of the loc operon are transcribed into a single polycistronicmRNA, which is traslated simulated simultaneously by several ribosmes into the three enzmes encoded by the operonThe structural genes of the loc operon are transcribed into a single polycistronic mRNA ,which is traslated simulated simultaneously by several ribosmes into the three enzmes encoded by the operon