Abstract
Summary
(1) A definite increase in survival time of mice inoculated with the Ak4 and Ak4R strains of transplantable mouse leukemia was noted when the animals were kept on a purified diet containing no folic acid and no riboflavin, to which had been added sulfasuxidine and 9-methyl PGA. (2) This increase in survival time could be prevented by the administration of citrovorum factor or folic acid; but not of riboflavin.
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