ALFRED PASIEKA / SCIENCE PHOTO LIBRARY ALFRED PASIEKA / SCIENCE PHOTO LIBRARY
Phenylalanine, molecular model. Essential alpha-amino acid, one of the 20 common amino acids used to form proteins. Atoms are represented as spheres and are colour-coded: carbon (grey), hydrogen (blue-green), nitrogen (blue) and oxygen (red).
Model release not required. Property release not required.