When examining proteins correlated with the third component separating gastritis and preneoplasia, Capping Actin Protein of Muscle Z-Line Subunit a (CAPZA1), a-L-Fucosidase 2 (FUCA2), Endoplasmic Reticulum Aminopeptidase 2 (ERAP2), and LEP are found. Here, ERAP2 is linked to gastritis.