Similar receptors exist inside plant cells and are called Plant R Proteins.

Orthologous receptors exist in humans providing, the authors propose, evidence for a mechanism of human pheromone detection.

The various cutaneous receptors do not exist everywhere in the skin, and where one is another is not.

The receptor existed in animals that lived more than 440 million years ago, before the last common ancestor of people and sharks.

This receptor can exist in three different conformations.

Thus, it turned out that the receptor for aldosterone existed before aldosterone.

Biology suggests an evolutionary connection between psychoactive plants and animals, as to why these chemicals and their receptors exist within the nervous system.

Moreover, some receptors could exist to modulate the system, turning it up or down and on or off.

Glutamate receptors exist primarily in the central nervous system.

Unfortunately it is often ignored that the same receptors also exist on cells other than lymphocytes.