Positively-selected SAMD9L codons and respective physicochemical properties for each mammalian species. SAMD9L sites under positive selection identified by at least three of the six used Maximum Likelihood methods. Codons are numbered according to the SAMD9L deduced proteins alignment (Additional file 6: Figure S5). The abbreviations correspond to the following species common names: Hosa - Human; Patr - Common chimpanzee; Gogo - Western gorilla; Poab - Sumatran orangutan; Nole - Northern white-cheeked gibbon; Caja - Common marmoset; Mamu - Rhesus monkey; Loaf - African bush elephant; Eqca - Horse; Calu - Domestic dog; Aime - Giant panda; Ereu - West European hedgehog; Orcu - European rabbit; Mumu - House mouse; Crgr - Chinese hamster; Rano - Brown rat; Capo - Domestic Guinea pig; Soar - Common shrew. To access the species scientific names, the list of abbreviations should be consulted. The background colors represent amino acid properties: polar positive (yellow), polar negative (orange), polar neutral (green), non-polar neutral (purple), non-polar aliphatic (blue) and non-polar aromatic (pink).