Affinity capture of peptides by microarray and related methods


Ontology type: sgo:Patent     


Patent Info

DATE

2010-09-14T00:00

AUTHORS

AEBERSOLD RUDOLF H , ZHANG HUI

ABSTRACT

The invention provides methods of detecting polypeptides in a sample. The method can include the steps of cleaving polypeptides in a test sample to generate peptides; adding a predetermined amount of isotopically labeled peptide standards to the cleaved test sample, wherein the peptide standards correspond to peptides cleaved with the same reagent used to cleave the test sample; contacting the cleaved test sample containing peptide standards with an array of immobilized binding agents specific for the peptide standards; washing the array to remove unbound peptides, thereby retaining affinity captured sample peptides and standard peptides; analyzing the affinity captured peptides using mass spectrometry; and determining the presence of bound test peptides and standard peptides. The method can further include the step of quantifying the amount of the test peptides by comparing the ratio of test peptide to corresponding standard peptide. More... »

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