OKLAHOMA CITY & AUSTIN, Texas--(BUSINESS WIRE)--Pure Protein, L.L.C., a biopharmaceutical company specializing in diagnostic and therapeutic reagents for use in immunology research and development, has announced that Chief Scientist William Hildebrand, Ph.D., and his team, have developed soluble Class II human leukocyte antigens (HLA). This represents a significant technology breakthrough that can dramatically impact multiple pharmaceutical and medical sectors and has enormous market potential. Autoimmune disease is a key area of interest for HLA research and product development.