... Martin, S., Swift, H.H., Ravazzola, M.,Orci, L. & Steiner, D.F. (1997) Incomplete processing of proin-sulin to insulin accompanied by elevation of Des-31.32 proinsulinintermediates in islets ... insulin 1 and 2 (b) and C-peptides1 and 2 (c) signals. The most abundant pep-tides turned out to be those from proinsulin.Insulin 1and2 andC-peptide 1and2 wereidentified, while the other prominent ... affects the intracellular level of calcium and specific binding of C-peptide to plasma membrane hasbeen observed. During proinsulin conversion, insulin and C-peptides are produced in equimolar...