22 HEINZ by Goresky et al.(8) who found that this fits the experimental observa tions. Since
this model implies equal mobility for loaded and unloaded car riers, a revision might be …

The growth of the field of biological transport is explosive, therefore imн possible to
summarize in a brief review. A preliminary survey of the comн munications published on this …

HE ABILITY TO CONCENTRATE certain substancesandto expel others seems to be present
in all living cells. Indeed, with the possible exception of certain intracellular parasites, no …

This article contains a summary of the ideas that led to the development of the equilibrium
theory of protein secretion as an alternative to the current cisternal packaging-exocytosis …

The relations between lipid solubility and membrane permeability are often the starting point
in texts dealing with transport. The lipid core of the membrane forms the primary barrier for …

The presence of a large variety of more or less specific transport systems in the cytoplasmic
membrane of living cells has long been established. It is generally believed that these …

I. Active and Inactive Transport Accumulation—the apparent concentration of a substance
into an anatomic compartment—usually arises from the partial conversion of the substance …

ANTON J. CAKLSON, MD, PH.D. Page 1 ANTON J. CAKLSON, MD, PH.D. Page 2
TRANSPORT THROUGH BIOLOGICAL MEMBRANES By HANS H. USSING Department of …

The analysis of transport kinetics has lacked both a unified treatment in which general rate
equations are written entirely in terms of experimental parameters, and a convention by …

The transport of amino acids across the plasma membranes of mammalian cells is a process
of fundamental physiological importance and has been the object of extensive study. The …