MVP and cancer: Although most of the literature on MVP protein focuses on mammalian cells, a group of MVPs has been identified in several marine organisms such as catfish (as a protein involved in cancer progression) (Margiotta et al. 2017), sea urchin (an important factor during embryonic development; Stewart et al. 2005), and in bivalves (participating in the phase III system of detoxification; Luedeking and Koehler 2004).