varying glucose concentrations in the incubation medium led to curvilinear eadie-hofstee plots in the jejunum only , thus suggesting the presence of both high-affinity , low-capacity ( km 0.37 mm ; vmax 8.3 nmol/min per mg protein ) and low-affinity , high-capacity ( km 4.2 mm ; vmax 30.9 nmol/min per mg protein ) systems in the proximal small intestine , and of a single carrier ( km 1.2 mm ; vmax 4.9 nmol/min per mg protein ) in the distal small intestine .
C0022378
jejunum
C0021852
small intestine