Fig. 4From: Genetic basis of brain size evolution in cetaceans: insights from adaptive evolution of seven primary microcephaly (MCPH) genesRadical amino acid changes in selected sites mapped on the three-dimensional structure of four MCPH genes in cetaceans. Radical changes of positively selected sites identified by two ML methods are colored with yellow ball and red ball whereas those positively selected sites with significant radical changes are marked with red ballBack to article page