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J. Biophys. and Biochem. Cytol., Vol 3, 141-150, Copyright © 1957 by Rockefeller University Press

ARTICLE

THE NUTRITION OF ANIMAL TISSUES CULTIVATED IN VITRO : IV. AMINO ACID REQUIREMENTS OF CHICK EMBRYONIC HEART FIBROBLASTS



Joseph F. Morgan Ph.D.1 and Helen J. Morton 1

1 From the Laboratory of Hygiene, Department of National Health and Welfare, Ottawa, Canada

1. The amino acid requirements of freshly explanted chick embryonic heart tissues cultivated in completely synthetic media have been determined, employing a nutritional depletion technique. Arginine, histidine, lysine, tyrosine, tryptophan, phenylalanine, cystine, methionine, threonine, leucine, and valine were found to be essential. Serine, isoleucine, glycine, and glutamine were found to be non-essential. Glutamic acid, aspartic acid, alpha-alanine, proline, and hydroxyproline were found to be inhibitory in this test system.

2. A total amino acid level of approximately 100 mg. per cent was found to be optimal and DL-amino acids were found to be non-toxic, unless used in high concentrations.

3. A comparison has been made of the amino acid requirements of various types of tissue cultures, of the chick, and of man and certain differences in these requirements have been discussed.

 Submitted on November 5, 1956


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