1. Applicability of the previously postulated active transport system for conveying glucose into the human red cell was tested in connection with a number of related substances, comprising 6-carbon aldoses and ketoses, 5-carbon aldoses, and 5- or 6-carbon polyhydric alcohols. 2. The alcohols did not perceptibly penetrate the cells; all the sugars penetrated, the rates differing, but all of the ...
