Peptide sequence: AKIFRGQVYS ELKYHPEMRF FHWFSKWRKL HRDQEYEVTW YISWSPCTKC Sequence homology: Human: 100%; Pig: 79%. The Apoliprotein B mRNA-editing, enzyme-catalytic, polypeptide-like (APOBEC) 3 is a multi-isoform member of the cytidine deaminase family o