||Stein, Wilfred D., Channels, carriers and pumps An introduction to Membrane Transport, 1990 Academic press inc. Harcourt Brace Jovanovich, Publishers pp.140 Table - link
||C. R. Cantor and P. R. Schimmel, "Biophysical chemistry." Freeman, New York 1986 AND Stein (1986) "Transport and diffusion across Cell Membranes," Chapter 4. Academic Press, Orlando Florida
||Chymotrypsin is a digestive enzyme that can perform proteolysis.