On the conversion of fructose to glucose by guinea pig intestine

V Ginsburg, HG Hers - Biochimica et biophysica acta, 1960 - Elsevier
Inverted intestinal sacs of the guinea pig, but not of the rat, convert fructose to glucose during
its passage through the intestinal wall. An exchange of 14 C-activity between C-1 and C-6 of
the glucose formed from [I-14 C] fructose under these conditions has been observed.
Fructokinase and glucose-6-phosphatase have been found to be present in the intestinal
mucosa of the guinea pig and it has been confirmed that the latter enzyme is absent in the
same tissue of the rat. These observations lead to the conclusion that the conversion of …