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Synthesis of Cystine in Wool from Elemental Sulfur and Sulfate Sulfur^{1, 2}

University of Illinois⁴

Abstract

Synthesis of cystine in the sheep from elemental and sulfate sulfur has been shown using S³⁵ as a tracer.

Although the data obtained in this experiment are limited, the sulfur³⁵ activity of the wool suggests that sulfate sulfur may be better utilized for the synthesis of cystine than is elemental sulfur. This may in part be due to the difference in solubility of the two compounds.

The possible significance of the findings in relation to ruminant nutrition is briefly discussed.

¹ These investigations have been conducted under authorization from the U. S. Atomic Energy Commission, Oak Ridge National Laboratory, Oak Ridge, Tennessee. Serial Nos. 8286 and 8287.

² This is the third paper in a series on sulfur in sheep nutrition.

³ Present address Department of Animal Husbandry, Iowa State College, Ames, Iowa.

⁴ Department of Animal Science.