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Phospholipids

Phospholipids are a major component of cell membranes.

Phospholipids have a glycerol backbone like triglycerides. However, they differ from triglycerides in the groups attached to the glycerol backbone.

While triglycerides have three fatty acid groups, phospholipids have two fatty acids and a phosphate group attached. Like triglycerides, the fatty acids are attached by ester bonds.