Fig. 1

Relation of proteome AT content with frequency of LCRs calculated at K = 1.9. a Overall AT content is calculated based on the proteome of each species. b Trends in AT-rich/poor (biased) and AT-balanced (unbiased) proteins. Boundaries for nucleotide enrichment were < 45 % and > 55 %. Trends were comparable when < 40 % and > 70 % boundaries were used. Species abbreviations are as in Table 1