Knowing how to find both charge and isoelectric point for amino acids is a critical MCAT skill. Understanding why an amino acid will gain or lose a proton at a given pH is even more critical. The MCAT is a test of logic and understanding, which is why this article will break down amino acid […]
Zwitterion and Amino Acid Charge Tutorial Video
Amino acids exist as zwitterions at physiological pH. A zwitterion by definition is a molecule with 2 (zwitter) ions, one positive and one negative for a net zero charge. This video shows you how to quickly calculate amino acid charge at any given pH by helping you recognize when a given side chain is protonated or […]
