Immunodetection on Western blot using a partially purified extract of granulocytes. Lane 1, polyclonal antibody against granulocyte catalase; lane 2, patient sample reacting with the 57/56-kD antigen; lane 3, healthy control sample; lane 4, MoAb against U937 enolase; lane 5, patient sample reacting with the 47-kD antigen.