# What is the Unit membrane model of the plasma membrane?

Jul 14, 2017

#### Explanation:

$\textcolor{red}{I n t r o \mathrm{du} c e r} =$ Sc. Robertson

According to him, the cell membrane is made of a three layer sequence of protein-lipid-protein.

The external layer is a hydrophilic layer made of protein molecules of diameter $20 A - 25 A$. The middle layer is a light hydrophobic layer made of phospholipids of diameter $25 A - 35 A$.

The total breadth of the cell membrane is $65 A - 85 A$.

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