Amino Acid Zwitterion Structure Diagram | Biochemistry Reference #2272417 (License: Personal Use)

This schematic depicts the zwitterionic form of a standard α-amino acid, where the amino group is protonated (H₂N⁺) and the carboxyl group is deprotonated (COO⁻), yielding a net neutral molecule. The central α-carbon is bonded to a variable side chain (R group), hydrogen, and the two ionized functional groups. This representation reflects the dominant species at physiological pH (~7.4).

Used in educational chemistry and biology resources to illustrate amino acid ionization states, protein structure fundamentals, or acid-base behavior; matches user intent for studying biochemistry, molecular biology, or preparing for exams like MCAT or AP Biology.