The nitrate compounds may generate nitric oxide, an important signal molecule that can give a false positive.

Potential signal molecules have been noted in certain nerve net anatomy.

They release signal molecules into their environment, by which they find each other and create swarms.

In immunology we had one signal molecule 10 years ago.

Alarmone is an intracellular signal molecule that is produced due to harsh environmental factors.

Many of the signal molecules that convey information to cells during the control of cellular differentiation or growth are called growth factors.

Phosphatidic acid is a signal molecule and acts to recruit SK1 to membranes.

In a narrower sense, it is a signal triggering molecule, binding to a site on a target protein.

The award committee said that "this was the first discovery that a gas can act as a signal molecule in the organism."

Now, drug companies are trying to develop more powerful heart drugs based on newer knowledge of nitric oxide's role as a signal molecule.