TABLE 2.
Effect of various competitors on fructose uptake
| Competitor | Mean % inhibition of uptakea |
|---|---|
| None | 0 |
| d-Mannitol | 5 |
| d-Glucose | 20 |
| d-Galactose | 20 |
| d-Sucrose | 24 |
| d-Xylose | 12 |
| d-Ribose | 86 |
| d-Mannose | 91 |
| d-Fructose | 97 |
a
The results are expressed as percent inhibition of fructose uptake and are means of four measurements from two independent experiments, with a variation of less than 5%. Uptake was realized with [U-14C]fructose at 50 μM and 50-fold excess of unlabeled competitors. The control value was 26 nmol of fructose transported/min/mg of protein.