Figure 4From: Molecular evolution of the enzymes involved in the sphingolipid metabolism of Leishmania: selection pressure in relation to functional divergence and conservationConservation profile of the protein families. A) IPCS protein family B) SPL protein family C) SPT1 protein family D) SPT2 protein family. Residues marked in yellow indicate the presence of positive selection while those coloured in gray or pink indicate neutral and purifying selection respectively.Back to article page