while transmethylation reactions involving phospholipids , non-polar lipids and proteins were all found to exist in rat colonic basolateral membranes , based on a number of observations , the results of the present studies suggest that transmethylation of membrane phospholipids , but not membrane non-polar lipids or proteins , influenced the fluidity of basolateral membranes which , in turn , modified na+ + k+-atpase activity in these membranes .
C0031676
phospholipids
C0025249
membrane