1. VAN DEN BROEK, H.W.J., and VEEGER, C., F.E.B.S. letters 1, 301 (1968).
2. VAN DEN BROEK, H.W.J., SANTEMA, J.S., and VEEGER, C., to be published.
3. University Microfilms Inc., Ann Arbor No 67–16542;PT Cohen,1967
4. KILGOAR, G.L., PELTON, S.P., and HUENNEKENS, F.M., J. Am. Chem. Soc. 79, 2254 0957).
5. KALSE, J.F., and VEEGER, C., Biochim. Biophys. Acta, 159, 244 (1968).