HLA-C and psoriasis: The most important chromosomal region for psoriasis predisposition is PSORS1 in the Human Leukocyte Antigen region (HLA, 6p21.3) where also CCHCR1 (Coiled-Coil α-Helical Rod protein 1), by position a plausible psoriasis candidate gene, is located [2], [3].