The Wave Length Effect Upon Erythemal and Carcinogenic Response in Psoralen Treated Mice11From the Department of Biochemistry, The University of Texas M.D. Anderson Hospital and Tumor Institute and the Departments of Biochemistry and Dermatology, Baylor University College of Medicine, Houston, Texas. Supported by grants from the Robert A. Welch Foundation, Humble Oil and Refining Company and the National Cancer Institute (NCI 2620), U. S. Department of Health, Education and Welfare.