Metabolic Research

Dimethyl Labeling

Stable Isotope Dimethyl Labeling (Application Note 38)

Shabaz Mohammed 
Departments of Chemistry and Biochemistry, University of Oxford, United Kingdom 
Biomolecular Mass Spectrometry and Proteomics Group, Utrecht University, Utrecht, The Netherlands 

  • Stable Isotope Dimethyl Labeling (Application Note 38)
The dimethyl labeling technique uses a reagent mixture (i.e., cyanoborohydride and formaldehyde in their unlabeled and stable isotope-labeled forms) to tag primary amines (i.e., the N-terminus and the ε-amino group of lysine) in proteins or peptides.  This is a fast, straightforward, and inexpensive approach to conduct 2- or 3-plex quantitative proteomic analyses of a variety of sample types (e.g., lysate, tissue).  To facilitate such experiments (example provided in application note 38), Cambridge Isotope Laboratories, Inc. is pleased to offer a variety of reductive methylation reagents.


Lai, Z.W.; Bolm, L.; Fuellgraf, H. et al. 2016. Characterization of various cell lines from different ampullary cancer subtypes and cancer associated fibroblast-mediated responses. BMC Cancer, 8;16:195. PMID: 26951071

Weißer, J.; Lai, Z.W.; et al. 2015. Quantitative proteomic analysis of formalin-fixed, paraffin-embedded clear cell renal cell carcinoma tissue using stable isotopic dimethylation of primary amines. BMC Genomics, 16:59  PMID: 26220445

Andrew Percy, PhD

Andrew Percy, PhD

Senior Applications Chemist - Mass Spectrometry

Dr. Andrew Percy is the Senior Applications Chemist for Mass Spectrometry. His responsibilities minimally involve overseeing product development, identifying new product market opportunities, assisting in the analysis of products for MS ‘omics applications, and providing technical support to customers.

Tasha Agreste

Tasha Agreste

Proteomics Product Manager, Deuterated Reagents & Intermediates Product Manager, China Sales - Research Products

Tasha Agreste, Product Manager for the Proteomics product line, has been with CIL since 1989. During her tenure at CIL, Tasha has held various positions including customer service, sales and marketing, where she has proven to be instrumental in enhancing CIL’s customer relationships.



Reductive Methylation Reagents