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.
Jewellery (British English) or jewelry (American English) consists of small decorative items worn for personal adornment, such as brooches, rings, necklaces, earrings, and bracelets. Jewellery may be attached to the body or the clothes, and the term is restricted to durable ornaments, excluding flowers for example.