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Chromosome location of ctsM with methylation RAATTY and GAATTC sites. (A) WT chromosome with RAATTY sites (green) and EcoRI sites (red) shown for DNA surrounding ctsM. ORFs are indicated by yellow arrows; those smaller than 200 aa are not shown. ctsM is shown in blue. Numbers under chromosomes indicate bases. (B) RAATTY sites and EcoRI sites in a ctsM::kan mutant.
