COL7A1 and Junctional epidermolysis bullosa, Herlitz type: Recessive dystrophic epidermolysis bullosa (RDEB) and junctional epidermolysis bullosa (JEB) are severe blistering skin disorders caused by mutations in genes encoding type VII collagen (COL7A1) and laminin 332 (LAMA3, LAMB3, or LAMC2), respectively.