Diglyceride

Definition

A diglyceride is a molecule consisting of two fatty acid chains covalently bonded to a glycerol molecule. It plays a key role in lipid metabolism and cellular structure.

5 Must Know Facts For Your Next Test

1. Diglycerides are intermediates in the synthesis and degradation of triglycerides.
2. They can act as emulsifying agents, helping to mix water and oils.
3. Diglycerides are less hydrophobic than triglycerides due to having one fewer fatty acid chain.
4. They are involved in signaling pathways within cells, influencing processes such as inflammation.
5. In microbial biochemistry, diglycerides can be components of membrane lipids, contributing to membrane fluidity and integrity.

Review Questions

• What structural characteristics distinguish diglycerides from triglycerides?
• How do diglycerides function as emulsifying agents?
• Describe the role of diglycerides in cellular signaling pathways.

Related terms

Triglyceride: A lipid molecule composed of three fatty acids bonded to a glycerol backbone.

Phospholipid: A lipid containing a phosphate group in its molecule, important for cell membranes.

Glycerol:

A simple polyol compound that forms the backbone of many lipids.