Which one of the following statements about spectrin, ankyrin, and peripheral proteins of the plasma membrane is INCORRECT?
1
Spectrin is a type of fibrous protein that forms a mesh-like structure on the cytoplasmic side of the red blood cell membrane, contributing to the cell's flexibility and shape.
2
Ankyrin serves as a link between spectrin and integral membrane proteins, facilitating the attachment of the spectrin-based meshwork to the plasma membrane.
3
Peripheral proteins, such as spectrin and ankyrin, directly propagate across the lipid bilayer, providing structural support from within the phospholipid layer.
4
The complex of spectrin, ankyrin, and other associated proteins is crucial for maintaining the shape and mechanical properties of certain cell types, particularly erythrocytes (red blood cells).
5
Question Not Attempted