Filtering by: Date 1989 Remove constraint Date: 1989 Degree Ph.D. Remove constraint Degree: Ph.D. Department Dept. of Microbiology and Immunology Remove constraint Department: Dept. of Microbiology and Immunology Keyword immunoglobulin variable region Remove constraint Keyword: immunoglobulin variable region Keyword antigen-antibody reactions Remove constraint Keyword: antigen-antibody reactions