Fig. 3
From: Sequencing refractory regions in bird genomes are hotspots for accelerated protein evolution
Heatmap of GC content profiles. The GC content of the predicted mRNA transcripts of eight birds, and four non-avian reptiles is shown together with the two reference genomes (Homo sapiens (HS) and Lepisosteus oculatus (LO)) using a heatmap display. Genes were positioned according to the order of the human genome a), the Lepisosteus oculatus genome (b) or the Gallus gallus genome (c). Most intense red (highest GC%) is found in the avian genomes (lines 2–9), typically in microchromosomes or subtelomeric in macrochromosomes when genes were ranked according to the chicken genome. When genes were ranked according to the human or gar genome, many regional GC maxima for birds were located far from the chromosomal ends. Numbering: 1 Homo sapiens, 2 Apteryx australis, 3 Struthio camelus, 4 Anser cygnoides, 5 Gallus gallus, 6 Calypte anna, 7 Aquila chrysaetos, 8 Pseudopodoces humilis, 9 Sturnus vulgaris, 10 Alligator mississippiensis, 11 Chrysemys picta, 12 Pogona vitticeps, 13 Python bivittatus, 14 Lepisosteus oculatus