Figure 2.

(a) Plot of N_c versus GC3s. There is a slight reduction in N_c for genes with lower GC3s values. (b) Plot of gene length in nucleotides against N_c. The plot appears to assume the shape of a normal distribution. Shorter genes have a much wider variance in N_c values, with longer genes showing a much more restricted set of values. (c) Plot of gene length in nucleotides against GC3s. In this plot also, there is a much greater variance among smaller genes. The genome seems to be in a state of equilibrium for both measures, with the only variance being attributable to sampling.