In biochemistry, a receptor is a protein molecule, embedded in either the plasma membrane or cytoplasm of a cell, to which a mobile signaling (or "signal") molecule may attach. A molecule which binds to a receptor is called a "ligand," and may be a peptide (such as a neurotransmitter), a hormone, a pharmaceutical drug, or a toxin, and when such binding occurs, the receptor undergoes a conformational change which ordinarily initiates a cellular response. However, some ligands merely block receptors without inducing any response (e.g. antagonists). Ligand-induced changes in receptors result in physiological changes which constitute the biological activity of the ligands.
Phys.org™ (formerly Physorg.com) is a leading web-based science, research and technology news service which covers a full range of topics.
Phys.org is a part of Science X network. With global reach of over 5 million monthly readers and featuring dedicated websites for hard sciences, technology, smedical research and health news, the Science X network is one of the largest online communities for science-minded people.Read more
Identify the news topics you want to see and prioritize an order.
Please, allow us to send you push notifications with new Alerts.