Many of the aminoglycoside antibiotics are much less effective against Escherichia coli under anaerobic conditions than under aerobic conditions. Assume that the rates of protein synthesis are about...

Many of the aminoglycoside antibiotics are much less effective against Escherichia coli under anaerobic conditions than under aerobic conditions. Assume that the rates of protein synthesis are about the same in both cases and that the antibiotic inhibits protein synthesis in vitro. How would you explain the reduced effectiveness under anaerobic conditions?