Surface proteins What is the function of surface marker proteins like the major

Question

Surface proteins

What is the function of surface marker proteins like the major histocompatibility complex?

1 Surface marker proteins are enzymes that break down food molecules that are then absorbed.

2 Surface marker proteins are receptors for hormones that then send messages out of the cell.

3 Surface marker proteins are ion channels that allow ions to enter the cell.

4 Surface marker proteins are identifiers that allow the immune system to recognize “self” cells.

5 Surface marker proteins are anchoring proteins that attach neighboring cells to each other.

Explanation / Answer

4. Surface marker proteins are identifiers that allow the immune system to recognize .

Surface marker are the marker which are present on the surface of the cell they act like a receptor where the binding of antigen antibody happen which will cause a immune response. The immune system uses these proteins to tell friendly cells from foreign invaders. They are as unique as fingerprints. They play an important role in organ transplants.

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