The utilization of phenylalanine and tyrosine for protein synthesis by human cells in tissue culture.


The amino acid requirements of a mouse fibroblast and of a number of normal and malignant human cells in tissue culture have been described in previous communications (l-4). All the cell lines examined, whether normal or malignant, required thirteen amino acids for survival and growth (arginine, cystine, glutamine, histidine, isoleucine, leucine, lysine… (More)

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