Association plots of gene expression with gene chromosomal localization, predicted export sequences and polymorphism. A : Bias in gene expression versus gene chromosomal localization (subtel = subtelomeric position of gene defined as <150 kb from telomere). B: Bias in gene expression versus presence of predicted export signals . C: Bias in gene expression versus gene polymorphism (as defined by presence or absence of non synonymous SNPs, from analysis of 3D7, Dd2, HB3, Ghana1 and IT genomes). Bar width is proportional to the number of genes per category and bar height to the Pearson residuals for an independence model. Blue and red colors indicate significant bias.