The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 2015
Filed:
Jun. 18, 2012
Sumio Ohtsuki, Miyagi, JP;
Tetsuya Terasaki, Miyagi, JP;
Sumio Ohtsuki, Miyagi, JP;
Tetsuya Terasaki, Miyagi, JP;
Tohoku University, Miyagi, JP;
Abstract
An object of the present invention is to provide a method for producing a stable isotope-labeled target peptide fragment in mass spectrometry, which achieves inexpensive and convenient production. As a solution to attain the object, the stable isotope-labeled target peptide fragment in mass spectrometry is produced using a method comprising the steps of: expressing a DNA conjugate in a system having a stable isotope-labeled amino acid to thereby prepare a stable isotope-labeled protein, wherein the DNA conjugate comprises: a tandemly linked DNA in which two or more DNAs encoding one or more types of target peptide fragments are linked in tandem; and a DNA encoding a peptide fragment for concentration measurement; subjecting the stable isotope-labeled protein to fragmentation treatment with trypsin to prepare a stable isotope-labeled peptide fragment for concentration measurement and stable isotope-labeled target peptide fragments; quantifying the stable isotope-labeled peptide fragment for concentration measurement using a liquid chromatograph-tandem mass spectrometer (LC/MS/MS); and calculating the concentration of the stable isotope-labeled target peptide fragment of each type from the quantification value of the stable isotope-labeled peptide fragment for concentration measurement.