IONIC EFFECTS ON GLUCOSE TRANSPORT AND METABOLISM BY ISOLATED MOUSE FAT CELLS INCUBATED WITH OR WITHOUT INSULIN .I. LACK OF EFFECT OF MEDIUM CA2+, MG2+ OR PO43-

1. 1. Effects of Ca2+, Mg2+ and PO43- on glucose metabolism and transport by fat cells have been studied in the presence and in the absence of insulin. 2. 2. The omission of Ca2+ and Mg2+ singly or together, as well as the omission of PO43- does not alter glucose transport by fat cells. 3. 3. In the absence of insulin, reciprocal replacement of Na+ and K+ increases glucose transport. 4. 4. In the presence of insulin, the absence of K+ does not alter glucose transport, while it is decreased in the absence of Na+. © 1969.