Which membrane component organizes clusters of transmembrane proteins into lipid rafts?

1. Cholesterol lies alongside the phospholipids in animal membranes and buffers the effect of temperature on fluidity. 2. It also serves other functions, such as organizing clusters of transmembrane proteins into lipid rafts. 3. Glycolipids are carbohydrate and lipid combinations that sit on the exterior surface and act in cell recognition. 4. Aquaporins are water channels and clathrin coats the inward-facing membrane during phagocytosis. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 5 "Structure and Function of Plasma Membranes", section 5.1 Components and Structure_