Summary:This experiment provides the quantification of multiple hormones using multiplexed-Luminex technology based on beads containing specific antibodies. Sample matrices include plasma, serum, tissue culture supernatants, and tissue or cell lysates. Serum C-peptide levels reflect insulin secretion and pancreatic -cell function. Serum C-peptide levels are altered in obesity, insulin resistance, and type 1 and type 2 diabetes.