Table 1.

Molecular weights (MWs) of unlabeled (light) and stable isotope-labeled (heavy) trypsin peptides used for SRM assay. The labeled amino acids are marked by red lettering and ^ signs. [CAM] represents carbamidomethylation of cysteine residues to prevent the disulfide bond formation and other oxidative changes.

Peptide Name	Peptide Sequences	MW (dal)	AA
pep-INSR_light	H2N-TFEDYLHNVVFVPR-OH	1735.9	14
pep-INSR_heavy	H2N-TFEDYLHNVVFV^PR-OH	1743.9	14
pep-PAX7_light	H2N-NVSLSTQR-OH	904.5	8
pep-PAX7_heavy	H2N-NVSLSTQR^-OH	914.5	8