ProinsulinC-PeptideInsulinProprotein Convertase 2Islets of LangerhansInsulinomaProprotein Convertase 1Insulin AntibodiesCarboxypeptidase HSubtilisinsProprotein ConvertasesCytoplasmic GranulesIodine IsotopesInsulin-Secreting CellsProtein PrecursorsDiabetes Mellitus, Type 1Protein Processing, Post-TranslationalImmunoradiometric AssayGlucoseDihydroxyacetone PhosphateCarboxypeptidase B