It is well known that proteins in processed meat products are frequently degraded, denatured or damaged (Hsieh, Chai, & Hwang, 2007; Sentandreu & Sentandreu, 2014), and protein-based methods such as SDS-PAGE, ELISA and chromatography are therefore inappropriate for authentication of processed meat products (Ballin, 2010; Sentandreu & Sentandreu, 2014).