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Journal of Cell Science, Vol 8, 701-708, Copyright © 1971 by Company of Biologists

Submitted on September 19, 1970

The Uptake of Vitamins by Mouse Fibroblast Cells (Strain LS) During Growth in a Chemically Defined Medium

G. J. BLAKER 1 and S. J. PIRT 1

1 Department of Microbiology, Queen Elizabeth College (University of London), Campden Hill, London W. 8, England

The uptake of biotin, choline, folic acid, hypoxanthine, inositol, nicotinamide, pantothenic acid, pyridoxine, riboflavin, thiamine and vitamin B12 by mouse LS cells in suspension culture was determined by microbiological assay methods. Based on the extent of uptake during cell growth, vitamin growth yields (cells produced/unit mass of vitamin utilized) were estimated for all of the vitamins, except folic acid, thiamine and B12. The growth yields were lower during the early phases of culture. No uptakes of folic acid or B12 could be demonstrated. During the period of incubation about half of the thiamine was irretrievably lost through spontaneous decomposition.

Submitted on September 19, 1970






© The Company of Biologists Ltd 1971