1. D. R. Barras and B. A. Stone, “The Biology ofEuglenaVol. 2, ed. by D. E. Buetow, Academic Press, New York, 1968, p. 159.
2. L. Svennerholm, “Methods in Enzymol.” Vol. 6, ed. by S. P. Colowick and N. O. Kaplan, Academic Press, New York, 1963, p. 459.