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The Requirement of Unidentified Factors for Mink1

One Figure

A. E. Schaefer, S. B. Tove, C. K. Whitehair and C. A. Elvehjem

Departments of Biochemistry and Veterinary Science, College of Agriculture, University of Wisconsin, Madison

1. Mink kits and adults fed highly purified rations supplemented with all the known crystalline vitamins require additional unidentified factors for normal nutrition. The characteristic deficiency symptoms are described.
2. Preliminary evidence from the fractionation of the unidentified factors in fresh raw liver indicates that methanol extraction removes 1 factor(s) and that the insoluble residue contains another factor(s).

1 Published with the approval of the Director of the Wisconsin Agricultural Experiment Station. These studies were supported by project 614, Wisconsin Agricultural Experiment Station, and a grant from the Wander Company, Chicago, Illinois.

Manuscript received 11 September 1947.


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C. A. ELVEHJEM
THE VITAMIN B COMPLEX
JAMA, November 27, 1948; 138(13): 960 - 971.
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