Artificial protein, method for absolute quantification of proteins and uses thereof

摘要

The invention provides an artificial protein for quantitative analysis of the proteome of a sample, cell or organism, comprising at least two consecutive peptides linked by a cleavage sequence for separating the peptides; a singular marker on one or more peptide for determination of the absolute amount of this fragment; and N-terminal and C-terminal extensions for protection of the peptides; wherein each peptide represents one single protein of the sample, cell or organism and each peptide is in a defined stoichiometry. The invention further provides a collection of peptides, a vector and a kit comprising the artificial protein and a method for quantitative analysis of the proteome.