methylation table4

Table 4. H. pylori J99 contains 24 active methyltransferases. The two motifs marked with an asterisk are split because our pattern-finding software was confounded by the partially overlapping CATG motif. GWCAYH (H = ‘not G’) + GWCACG (the missing G!) = GWCAYN (correct call; Y = A/T) – CATG (distinct R-M system target, called correctly).