Nat. Biotechnol. 22, 589–594 (2004)

Technical note: Recent experiments with other 2A-linked constructs have suggested that cleavage efficiency can be influenced by the protein NH2-terminal to the 2A peptide. In some instances, we have found that cleavage efficiency can be improved by placing a Gly-Ser-Gly linker between NH2-terminal protein and the 2A peptide.