Figure 1. Illustration of the structure of a low-density lipoprotein (LDL) particle.
Comprised mostly of lipids, this structure includes carrier proteins (pink) known as apo-B proteins, which assist LDL transport in the blood. Iin the outer coat are phospholipids (green) and free cholesterol molecules (yellow). Within the core, cholesterol molecules (yellow) are bound into long esters by fatty acid chains (red).
JOHN BAVOSI / SCIENCE PHOTO LIBRARY / PHOTO RESEARCHERS, INC. | 
