C-Peptide (C-Peptide) yog ib qho kev sib txuas peptide tsim los ntawm 31 amino acids nrog qhov hnyav molecular txog 3021 Daltons. Lub pancreatic β-hlwb ntawm pancreas tsim cov proinsulin, uas yog cov saw hlau ntev heev. Proinsulin tau tawg ua peb ntu nyob rau hauv qhov kev ua ntawm cov enzymes, thiab ntu pem hauv ntej thiab nraub qaum rov qab los ua insulin, uas yog tsim los ntawm A thiab B saw, thaum ntu nruab nrab yog ywj siab thiab paub tias yog C-peptide. . Insulin thiab C-peptide yog secreted nyob rau hauv equimolar concentrations, thiab tom qab nkag mus rau hauv cov ntshav, feem ntau ntawm cov tshuaj insulin yog inactivated los ntawm lub siab, thaum C-peptide yog tsis tshua muaj los ntawm lub siab, ntxiv rau C-peptide degradation qeeb dua insulin, yog li ntawd cov tshuaj insulin. Qhov concentration ntawm C-peptide hauv cov ntshav yog siab dua li ntawm cov insulin, feem ntau ntau dua 5 zaug, yog li C-peptide qhia tau tseeb dua qhov kev ua haujlwm ntawm pancreatic islet β-hlwb. Kev ntsuas ntawm qib C-peptide tuaj yeem siv rau kev faib cov ntshav qab zib mellitus thiab nkag siab txog kev ua haujlwm ntawm pancreatic β-hlwb ntawm cov neeg mob ntshav qab zib mellitus. Kev ntsuas qib C-peptide tuaj yeem siv los faib cov ntshav qab zib thiab nkag siab txog kev ua haujlwm ntawm pancreatic β-hlwb hauv cov neeg mob ntshav qab zib. Tam sim no, C-peptide ntsuas txoj kev siv dav hauv cov chaw kho mob suav nrog radioimmunoassay, enzyme immunoassay, electrochemiluminescence, chemiluminescence.