Identify three components of the plasma membrane other than phospholipids

Asides from phospholipid (which is made up of two fatty acid tails, and a phosphate-linked head and glycerol), the plasma membrane also has the following components:

1. Cholesterol (Which together with phospholipids form the lipid bilayer)

2. Proteins

3. Carbohydrate Groups

not sure if this what   you'r looking for would be percent composition

the missing space is phylum