Specific peptides are provided, and derived ionization characteristics of those peptides, from the Hepatocyte Growth Factor Receptor (cMET) protein. The peptides are particularly and surprisingly advantageous for quantifying by the method of Selected Reaction Monitoring (SRM) mass spectrometry the cMET protein directly in biological samples that have been fixed in formalin, or what can also be termed as Multiple Reaction Monitoring (MRM) mass spectrometry. Such biological samples are chemically preserved and fixed where the biological sample is selected from tissues and cells treated with formaldehyde containing agents/fixatives including: formalin-fixed tissue/cells； formalin-fixed/paraffin embedded (FFPE) tissue/cells； FFPE tissue blocks and cells from those blocks； and tissue culture cells that have been formalin fixed and or paraffin embedded. A protein sample is prepared from the biological sample using the Liquid Tissue&trade； reagents and protocol and the cMET protein is quantitated in the Liquid Tissue&trade； sample by the method of SRM/MRM mass spectrometry by quantitating in the protein sample at least one or more of the peptides described. These peptides can be quantitated if they reside in a modified or an unmodified form. An example of a modified form of a cMET peptide is phosphorylation of a tyrosine, threonine, serine, and/or other amino acid residues within the peptide sequence.La présente invention concerne des peptides spécifiques, ainsi que des caractéristiques d'ionisation dérivée de ces peptides, à partir de la protéine du récepteur du facteur de croissance hépatocytaire (cMET). Les peptides sont avantageux pour la quantification, par le procédé de spectrométrie de masse de mesure de réactions sélectionnées (SRM), de la protéine cMET directement dans les échantillons biologiques qui ont été fixés dans du méthanediol, ou par ce que l'on peut également appeler une spectrométrie de masse par surveillance de réaction multiple (MRM). Ces échantillons
