Dietary Factors in the Utilization of Homocystine
- 1 March 1948
- journal article
- research article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 34 (3) , 81-88
- https://doi.org/10.1073/pnas.34.3.81
Abstract
Homocystine can replace methionine in the diet of Tetrahymena provided some factor or factors found in liver are present. The liver factor appears not to be a methyl donor as is indicated by the failure of methionine replacement by homocystine in the presence of choline. The liver factor can best be described as a cotransmethylase. A discussion of the mechanism or mechanisms of transmethylation in animals is given.Keywords
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