1. Hershko, A., Ciechanover, A., Heller, H., Haas, A. L., and Rose, I. A., 1980, Proposed role of ATP in protein breakdown: Conjugation of proteins with multiple chains of the polypeptide of ATP-dependent proteolysis, Proc. Natl. Acad. Sci. U.S.A. 77: 1783–1786.
2. Chin, D. T., Kuehl, L., and Rechsteiner, M., 1982, Conjugation of ubiquitin to denatured hemoglobin is proportional to the rate of hemoglobin degradation in HeLa cells, Proc. Natl. Acad. Sci. U.S.A. 79: 5857–5861.
3. Hershko, A., Eytan, E., Ciechanover, A., and Haas, A. L., 1982, Immunochemical analysis of the turnover of ubiquitin-protein conjugates in intact cells, J. Biol. Chem. 257: 13964–13970.
4. Gregori, L., Marriott, D., West, C. M., and Chau, V., 1985, Specific recognition of calmodulin from Dictyostelium discoideum by the ATP, ubiquitin-dependent degra-dative pathway, J. Biol. Chem. 260: 5232–5235.
5. Shanklin, J., Jabben, M., and Vierstra, R. D., 1987, Red light-induced formation of ubiquitin-phytochrome conjugates: Identification of possible intermediates of phytochrome degradation, Proc. Natl. Acad. Sci. U.S.A. 84: 359–363.