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Genetic organization of the M. catarrhalis LOS biosynthesis gene cluster containing pyrG-kdsA-eno. The large arrows represent the direction of transcription, and the site of the TN insertion identified in MCTN38 is denoted (EZ::TN IS). The short, numbered arrows indicate the relative annealing positions of the oligonucleotide primers used in PCR (A) and RT-PCR (B) analyses.
