Figure 4From: Evolution of gene structure in the conifer Picea glauca: a comparative analysis of the impact of intron sizeGene by gene pair-wise comparisons of total length of intronic sequences in P. glauca , A. thaliana, Populus trichocarpa and Z. mays. (A) highly expressed genes and (B) genes associated with secondary cell-wall formation and nitrogen metabolism.Back to article page