Novick, Kim & Lee, PLLC
Multiplex proteome quantification method based on isobaric dimethyl labeling
A multiplex proteome quantification method based on isobaric dimethyl labeling implements dimethyl labeling of peptide N-terminal in an acidic condition and C-terminal in an alkaline condition one after another by means of Hall the property that a dimethylation reaction has different rates on an amino group at the peptide N-terminal and an amino group on a Lysine side chain at the peptide C-terminal in the acidic condition. Multiplex labeling of peptide samples is implemented by means of the organic combination of various isotope forms of a dimethyl labeling reagents. The mass-to-charge ratios in MS1 of peptides after multiplex labeling are completely the same, the mass-to-charge ratios of the fragment ions in MS2 are different, and multiplex quantitative analyses are carried out by extracting the intensity values of corresponding fragment ions in the MS2.
DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES
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Yuan Yukui Kaiguang Jianhui Lihua
Zhou Zhang Yang Liu Zhang