The MAPK/ERK pathway is a chain of proteins in the cell that communicates a signal from a receptor on the surface of the cell to the DNA in the nucleus of the cell. The signal starts when a signaling molecule binds to the receptor on the cell surface and ends when the DNA in the nucleus expresses a protein and produces some change in the cell, such as cell division. The pathway includes many proteins, including MAPK, which communicate by adding phosphate groups to a neighboring protein, which ac
accessory noun (EXTRA) C1 [ C usually plural ] something added to a machine or to clothing that has a useful or decorative purpose: She wore a green wool suit with matching accessories (= shoes, hat, bag, etc.). Sunglasses are much more than a fashion accessory.
pin - a piece of jewelry that is pinned onto the wearer's garment. ring, band - jewelry consisting of a circlet of precious metal (often set with jewels) worn on the finger; she had rings on every finger; he noted that she wore a wedding band. tie clip - a piece of jewelry that holds a man's tie in place.