A non-labeled, non-radio-isotopic method for DNA polymerase proofreading and a DNA repair assay was developed by using high-resolution MALDI-TOF mass spectrometry and a single nucleotide extension strategy. The assay proved to be very specific, simple, rapid, and easy to perform for proofreading and repair patches shorter than 9-nucleotides.
Su, K., Goodman, S. D., Lai, H., Yen, R., Hu, W., Cheng, W., Lin, L., Yang, Y., Fang, W. Proofreading and DNA Repair Assay Using Single Nucleotide Extension and MALDI-TOF Mass Spectrometry Analysis. J. Vis. Exp. (136), e57862, doi:10.3791/57862 (2018).