Slater, J V Comparative Biological Activity of agr-Lipoic Acid and Protogen in the Growth of Tetrahymena. [electronic resource] - Science (New York, N.Y.) Apr 1952 - 376-7 p. digital Publication Type: Journal Article ISSN: 0036-8075 Standard No.: 10.1126/science.115.2988.376 doi Subjects--Topical Terms: AnimalsBiological PhenomenaEukaryotaInvertebratesPhysiological PhenomenaPyruvatesTetrahymenaThioctic Acid