The neurotransmitter binds to receptor molecules in the membrane of the target cell.

The virus's primary target is a receptor molecule, CD-4, which lies embedded in the surface of certain cells.

Lipoteichoic acids also act as receptor molecules for some Gram-positive bacteriophage.

The binding of neurotransmitter causes the receptor molecule to be activated in some way.

The receptor molecules are conduits for information, with one end outside the cell and the other inside.

More messages make them more active, and more likely to add phosphate to receptor molecules.

The movement of signal or stimulus can be simple, like that associated with receptor molecules.

The hope is that these peptides might compete with the virus proteins for binding to the receptor molecules.

A receptor molecule on the surface of the egg may trigger the key first steps.

Each divot is filled with receptor molecules that look for a specific substance, like sugar or citric acid.