PLA2G4D and psoriasis: Other potential psoriasis autoantigens include melanocyte-produced A Disintegrin-like and Metalloprotease domain containing ThromboSpondin type 1 motif-Like 5 (ADAMTSL5) [23], and phospholipase A2 group IVD (PLA2G4D), the latter being involved in the production of non-protein lipid autoantigens in psoriatic lesions [24].