Abstract: A Method for the detection of the conformational state of a protein contained in a complex mixture of further proteins and/or other biomolecules, is proposed as well as assays for such a method. The method comprises the following steps: (1) Limited proteolysis of the complex mixture under a condition where the protein is in the conformational state to be detected leading to a first fragment sample; (2) Denaturation of the first fragment sample to a denaturated first fragment sample; (3) Complete fragmentation of the denaturated first fragment sample in a digestion step to a completely fragmented sample; and (4) Analytical analysis of the completely fragmented sample for the determination of fragments characteristic of having been the result both the limited proteolysis of step 1 as well as of the complete fragmentation in the digestion step 3. for the determination of the conformational state.

Abstract: The invention relates to a method for determining a biomarker on single cell level by counting a first portion of a cell sample, subjecting said first portion to conditions whereby the biomarker is fragmented, adding to a known number n(k) of labelled biomarker fragments, measuring a first and a second parameter of said first portion, wherein said first parameter corresponds to the amount of said biomarker fragment and said second parameter corresponds to the amount of said labelled biomarker fragment yielding a biomarker fragment value, v(u), and a labelled biomarker fragment value v(k), respectively, and relating v(u) and v(k) with n(k) and c(1), thereby determining an average number of biomarker molecules per cell, m(u), of said first portion.

Abstract: A Method for the detection of the conformational state of a protein contained in a complex mixture of further proteins and/or other biomolecules, is proposed as well as assays for such a method. The method comprises the following steps: (1) Limited proteolysis of the complex mixture under a condition where the protein is in the conformational state to be detected leading to a first fragment sample; (2) Denaturation of the first fragment sample to a denaturated first fragment sample; (3) Complete fragmentation of the denaturated first fragment sample in a digestion step to a completely fragmented sample; and (4) Analytical analysis of the completely fragmented sample for the determination of fragments characteristic of having been the result both the limited proteolysis of step 1 as well as of the complete fragmentation in the digestion step 3. for the determination of the conformational state.

Abstract: The invention relates to a method for the determination of an MRM or SRM assay for a protein of interest, a peptide of interest, or a group of proteins/peptides of interest or a whole proteome. It essentially includes the following steps: (1) a list of proteins of interest is selected and for each member at least one or a list of candidate proteotypic peptides is derived (2) this at least one peptide is synthesized/generated essentially without subsequent purification; (3) this at least one unpurified peptide is analyzed by selected reaction monitoring (SRM) preferably coupled to liquid chromatography (LC-SRM) or analogous techniques; (4) validation and/or optimisation of the corresponding assay of the at least one peptide with determination of the SRM coordinates for a peptide/protein of interest and/or of a regulator of interest is achieved.

Abstract: The invention relates to a method for the determination of an MRM or SRM assay for a protein of interest, a peptide of interest, or a group of proteins/peptides of interest or a whole proteome. It essentially includes the following steps: (1) a list of proteins of interest is selected and for each member at least one or a list of candidate proteotypic peptides is derived (2) this at least one peptide is synthesized/generated essentially without subsequent purification; (3) this at least one unpurified peptide is analyzed by selected reaction monitoring (SRM) preferably coupled to liquid chromatography (LC-SRM) or analogous techniques; (4) validation and/or optimisation of the corresponding assay of the at least one peptide with determination of the SRM coordinates for a peptide/protein of interest and/or of a regulator of interest is achieved.