Requirement of the Mouse for Pantothenic Acid and for a New Factor of the Vitamin B Complex

Abstract
It has been shown that besides thiamine, riboflavin, and vitamin B6, at least two additional factors are necessary for normal growth in the mouse. One of these is pantothenic acid. Under the conditions present in our experiments, the daily requirement of the mouse for this factor is about 30 micrograms in terms of d-calcium pantothenate. The second of these is alkali-stable and is present in liver extract.