the levels of proinsulin , immunoreactive insulin , true insulin ( calculated from the difference , namely immunoreactive insulin-proinsulin ) and c-peptide were determined in the fasting state and during a 3-h oral glucose tolerance test after administration of 100 g of glucose in 12 patients with cirrhosis with normal oral glucose tolerance test ( 50 g ) and in 12 healthy subjects serving as controls .
C0033362
proinsulin
C0006558
c-peptide