1.   Before a virus can infect an animal cell it must first bind to specific receptor molecules embedded in the cell membrane.

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

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

4.   The neurotransmitter sticks to the receptor molecule, and together they are able to open a pore in the cell membrane.

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

6.   The result is fewer receptor molecules.

7.   There are at least two types of postsynaptic channels that open up when glutamate binds to their receptor molecules.

8.   Molecules like BMP deliver their message by binding to a receptor molecule sticking out from the outer membrane of a cell.

9.   The drug is believed to act by blocking receptor molecules on the outside of cells to slow the rate of cell division.