Comparison of glucose and insulin concentrations in macaque sera and plasma.
The glucose and insulin concentrations in blood from Macaca nigra and M. mulatta were determined after an overnight fast and 3 min after a glucose infusion. Blood treatment included clotting for serum or additions of fluoride, heparin, or heparin plus fluoride. Samples were centrifuged at 0 min or after being held at 22 degrees C for 20, 40, or 60 min. Levels of glucose and insulin generally agreed within 1 SD at all times examined for samples removed at 0 or 3 min.