Distribution of CpG ratios(*) and GC content in protein
coding genes of Arthropod species.
Four species (Aphid, Apis, Nasonia and Daphnia) have both DNA
cytosine-5 methyltransferase (DNMT) genes
DNMT 1 and
(Daphnia DNMT 3b),
the other species do not (Tribolium, Drosophila mel., Dros. pseudo. and
(*) The CpG observed/expected ratio is computed as (observed CpG)/(expected
CpG), where expected CpG is calculated as (GC content/2)^2.