Question: what is the difference between glut 2 and glut 4?
Answer: GLUT2 is insulin independent (Liver and pancreas), GLUT4 is insulin dependent (on muscle, adipose, heart). GLUT2 has a higher Km and so transport is not maximally active at low concentrations. Postprandially when blood glucose is higher than the km transport into liver and pancreas will be high.