Summary
N-2-Hydroxyethylpiperazine-N′-2-ethane sulfonic acid (HEPES) and N-tris(hydroxymethyl)methyl-2-aminoethane sulfonic acid (TES) have been found to be nontoxic substitutes for bicarbonate buffer in cell culture media. WI-38 embryonic human lung cells have been carried beyond the 60th passage with both HEPES and TES buffers.
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Massie, H.R., Samis, H.V. & Baird, M.B. The effects of the buffer hepes on the division potential of WI-38 cells. In Vitro 7, 191–194 (1972). https://doi.org/10.1007/BF02615974
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DOI: https://doi.org/10.1007/BF02615974