Epidermolysis Bullosa, Junctional 2b, Severe, is also known as epidermolysis bullosa, junctional 2b, generalized severe. An important gene associated with Epidermolysis Bullosa, Junctional 2b, Severe is LAMA3 (Laminin Subunit Alpha 3). Affiliated tissues include skin, and related phenotypes are abnormal blistering of the skin and oral mucosal blisters