Several autoantigens have been implicated in psoriasis, amongst which are keratin 13 (K13), heterogeneous nuclear ribonucleoprotein-A1 (hnRNP-A1), and Rab coupling protein isoform 3 (FLJ00294) (RAB11FIP1), although the epidermal autoantigens have not been conclusively identified [3]. This evidence concerns the gene HNRNPA1 and psoriasis.