Abstract: Methods of predicting rapid decline in renal function in diabetes employing panels of biomarkers. The methods are useful for predicting risk of decline of renal function in individual subject and also for selecting subjects for clinical trials.

Abstract: A method for screening for variant peptides uses mass spectrometry (MS). A system and a kit may be used for performing the method. Proteins in a sample are digested to form a defined series of peptides. The defined series of peptides are ionized. The ionized species are subjected to collision induced dissociation. Species of known mass/charge ratio are detected to confirm the presence of the protein variant in the original sample.

Abstract: A method for screening for variant peptides uses mass spectrometry (MS). A system and a kit may be used for performing the method. Proteins in a sample are digested to form a defined series of peptides. The defined series of peptides are ionized. The ionized species are subjected to collision induced dissociation. Species of known mass/charge ratio are detected to confirm the presence of the protein variant in the original sample.

Abstract: A method for screening for variant peptides uses mass spectrometry (MS). A system and a kit may be used for performing the method. Proteins in a sample are digested to form a defined series of peptides. The defined series of peptides are ionized. The ionized species are subjected to collision induced dissociation. Species of known mass/charge ratio are detected to confirm the presence of the protein variant in the original sample.

Abstract: The invention relates to a method for aiding the diagnosis of a disorder in a subject, said method comprising; providing a sample from said subject wherein the sample comprises blood; assaying at least two characteristics of said sample, said characteristics selected from: the structural composition of a polypeptide comprised by said sample; a metabolite comprised by said sample; and a catalytic activity comprised by said sample, wherein each of said at least two characteristics is determined from a multiplexed analysis of the same sample. The invention also relates to certain compositions.

Abstract: The invention relates to methods for making a peptide standard for mass spectrometry said method comprising (a) identifying endopeptidase cleavage sites in a parent polypeptide sequence of interest; (b) selecting peptide sequences from said parent polypeptide which are defined by endopeptidase cleavage sites of step (a); (c) adding a C-terminal extension to each selected sequence; wherein if the endopeptidase cleavage site is C-terminal to its recognition sequence then the C-terminal extension comprises 1 to 6 amino acids, wherein if the endopeptidase cleavage site is N-terminal to its recognition sequence then the C-terminal extension comprises said recognition sequence, wherein if the endopeptidase cleavage site is within its recognition sequence then the C-terminal extension comprises the remainder of said recognition sequence C-terminal to the cleavage site; and (d) synthesizing a peptide having the extended amino acid sequence of step (c).

Abstract: The invention relates to a method for aiding the diagnosis of a disorder in a subject, said method comprising; providing a sample from said subject wherein the sample comprises blood; assaying at least two characteristics of said sample, said characteristics selected from: the structural composition of a polypeptide comprised by said sample; a metabolite comprised by said sample; and a catalytic activity comprised by said sample, wherein each of said at least two characteristics is determined from a multiplexed analysis of the same sample. The invention also relates to certain compositions.

Abstract: The invention relates to methods for making a peptide standard for mass spectrometry said method comprising (a) identifying endopeptidase cleavage sites in a parent polypeptide sequence of interest; (b) selecting peptide sequences from said parent polypeptide which are defined by endopeptidase cleavage sites of step (a); (c) adding a C-terminal extension to each selected sequence; wherein if the endopeptidase cleavage site is C-terminal to its recognition sequence then the C-terminal extension comprises 1 to 6 amino acids, wherein if the endopeptidase cleavage site is N-terminal to its recognition sequence then the C-terminal extension comprises said recognition sequence, wherein if the endopeptidase cleavage site is within its recognition sequence then the C-terminal extension comprises the remainder of said recognition sequence C-terminal to the cleavage site; and (d) synthesising a peptide having the extended amino acid sequence of step (c).

Abstract: The present invention relates to a method for screening for variant peptides using mass spectrometry (MS). The present invention also relates to a system and a kit for performing the method.