1. Spence, M.W., Byers, D.M., Palmer, F.B.St.C., Cook, H. W.: J. Biol. Chem., 264, 5358–5363(1989)
2. Zou, L., Kojima, N., Kito, M., Yagi, K.: Biotechnol. Appl. Biochem., 11, 217–225 (1989)
3. Vanha-Perttula, T.: FEBS Lett., 233, 263–267 (1988)
4. Quintern, L.E., Weitz, G., Nehrkorn, H., Tager, J.M., Schram, A.W., Sandhoff, K.: Biochim. Biophys. Acta, 922, 323–336 (1987)
5. Rousson, R., Bonnet, J., Louisot, P., Vanier, M.T.: Biochim. Biophys. Acta, 924, 502–508(1978)