Cell Features
... However, the motion and fluidity of phospho-lipids enable the cell-membrane proteins to move around within the lipid bilayer. There are different types of proteins in the cell membrane. Each type plays a vital role in the life of a cell. Marker proteins, which are attached to a carbohydrate on the cell’s surface, help other cells recognize their cell type—liver cell or heart cell, for example. Receptor proteins recognize and bind to specific substances, such as signal molecules, outside the cell. Various enzymes in the cell membrane are involved in important biochem-ical reactions in the cell. Transport proteins aid the movement of substances into and out of the cell. Type of protein. Function 6/7. Marker- help other cells recognize their cell type 8/9. Receptor- recognize and bind to specific substances outside the cel...