<prompt> In pemphigus vulgaris, antibodies are present againstBasement membraneIntercellular substanceCell nucleusKeratin  <response>: Pemphigus is an autoimmune disease, with formation of antibodies to pemphigus antigen present in intercellular substance. Pemphigus antigens are desmoglein 3 1 in P. vulgaris and desmoglein 1 in P. foliaceous. 