Here, we present a protocol for an efficient single step purification of the active untagged human ten-eleven translocation-2 (TET2) 5-methylcytosine dioxygenase using ion-exchange chromatography and its assay using a liquid chromatography-tandem mass spectrometry (LC-MS/MS)-based approach.
Bhattacharya, C., Dey, A. S., Ayon, N. J., Gutheil, W. G., Mukherji, M. Efficient Purification and LC-MS/MS-based Assay Development for Ten-Eleven Translocation-2 5-Methylcytosine Dioxygenase. J. Vis. Exp. (140), e57798, doi:10.3791/57798 (2018).