<Tr> <Td> Characteristic </Td> <Td_colspan="3"> Proximal tubule </Td> <Td> Loop of Henle </Td> <Td> Distal convoluted tubule </Td> <Td> Collecting duct system </Td> </Tr> <Tr> <Td> S1 </Td> <Td> S2 </Td> <Td> S3 </Td> </Tr> <Tr> <Td> Reabsorption (%) </Td> <Td> 98 </Td> <Td_colspan="1"> </Td> <Td_colspan="1"> </Td> <Td_colspan="1"> </Td> <Td_colspan="3"> Beyond the distal convoluted tubule: 2% </Td> </Tr> <Tr> <Td> Reabsorption (mmol / day) </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr>

Where does glucose reabsorption occur in a nephron