Abstract
The intracellular ATP and amino acid concentrations were determined in human fibroblast cultures reaching confluence. The values obtained were very different, depending on the cell harvesting method: trypsinization or scraping. Trypsinization appeared to be the better method for measuring the ATP concentrations (21.25 +/- 0.96 nmol per mg cell protein), this level being much lower with scraping. On the contrary, scraping was the most appropriate method for amino acid measurement. This work underlines the importance of harvesting methods for metabolic studies in human cell cultures.
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