Clans and families of Leishmania spp. proteases. Classification of proteases sequence researched. Nomenclature is based on the MEROPS database (December 20013, release 9.10 - http://merops.sanger.ac.uk/). Numbers in squares represent the estimated number of protease gene in each family for each species, as number in rectangle corresponds to the same number of protease per specie. LbrM - L. (V.) braziliensis, LinJ - L. (L.) infantum, LmjF - L. (L.) major, LmxM - L. (L.) mexicana.