Protective antigen's actual role is to latch onto cell receptors.
To date the identity of the cell receptors involved has not been clearly elucidated.
These helices may indicate the peptide is a cell receptor.
In fact, every intact antibody can bind to cell receptors or other proteins with its Fc region.
Siderophores are then recognized by cell specific receptors on the outer membrane of the cell.
Fc binds to various cell receptors and complement proteins.
The same cell receptor is also a point of contact for Human Coronaviruses.
Integrins function as the major cell receptor for extracellular matrix protein.
The spikes, made of proteins, are what grab onto cell receptors.
Agonist is often referred to as a drug that stimulates natural processes in the body and beta-2 to a cell receptor.