the intravenous injection of a dose of proinsulin ( 6 micrograms/kg ) , which did not produce hypoglycemia but was the molar equivalent of insulin used in the first protocol , failed to modify the gh or prolactin responses to a combined injection of gh-releasing hormone ( 1 microgram/kg ) and thyrotropin-releasing hormone ( 500 micrograms ) .
C0033362
proinsulin
C0021641
insulin