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The Preferential Utilization by Bull Spermatozoa of Glucose as Compared to Fructose¹

Department of Dairy Science, University of Illinois, Urbana

ABSTRACT

Egg yolk has a sparing effect on fructose utilization by bull spermatozoa during anaerobic incubation at 37 or 46.5°C.

This sparing effect can be explained by the occurrence of glucose in egg yolk and the utilization of glucose in preference to fructose by bull spermatozoa.

At a ratio of 85 parts of fructose to 15 parts of glucose, an equal utilization of fructose and glucose by washed spermatozoa may be expected during incubation at 37° C. under nitrogen, if the initial level of TRS is approximately 0.67 mg. per 10⁸ cells.

¹ The data for this paper are from a thesis presented by the senior author to the Graduate College, University of Illinois, in partial completion of the requirements for the degree of Master of Science in Dairy Science. June, 1951.