The Property of Protein That Is Most Important to Its

The property of protein that is most important to its buffering properties is

A) its ability to create osmotic pressure in intravascular,intracellular,and interstitial fluids.
B) the fact that amino acids include both an acid carboxyl group and an amine base group.
C) its ability to pump nutrients and other vital substances across cell membranes.
D) its communication (hormones) and catalytic (enzyme) functions that help regulate body functions.