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The following study conducted by Wei et al

The organic layer was dried over anhydrous Na 2 SO 4 , filtered, concentrated in vacuo, and purified by silica gel column chromatography to give light-yellow oil pruducts 2,2-(propane-2,2-diylbis(sulfanediyl))bis(ethan-1-ol)

In Schmidt-Traub, H., Schulte, M., & Seidel-Morgenstern, A

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Because intracellular cysteine level is usually below 100 M under the physiological conditions 18,19 , the interference of RT signals from cysteine is minimal

Mascarenhas R, Zhu Li, Gherasim C, Ruetz M, Banerjee R