PERP and psoriasis: Finally, seven genes were selected from the microarray studies: TP53 apoptosis effector - PERP, S100 calcium binding protein A8 - S100A8, fatty acid binding protein 5 (psoriasis-associated) - FABP5, stratifin - SFN, carbonic anhydrase 12 - CA12, junction plakoglobin - JUP and cystatin A - CSTA. Five out of the seven selected genes, namely, S100A8FABP5SFNJUP and CSTA, have been described by Hsiao et al. [15] as “vulva-selective” .