Question

What proteins are fundamental to the immune system?

Answer 1

antibodies are fundamental proteins to immune system

Explanation:

Antibodies are the proteins which are responsible for activating immune system and then launching an immune response.

antibodies are present over different cell types like macrophages, B-cell, T-cell, dendritic cells, etc. and are involved in having a long term memory effect.

antibodies secreted in the blood stream identifies and then tag pathogen for recognition by microbicidal cells of immune system.