In chemistry, a contact number (CN) is a simple solvent exposure measure that measures residue burial in proteins. The definition of CN varies between authors, but is generally defined as the number of either C or C atoms within a sphere around the C or C atom of the residue. The radius of the sphere is typically chosen to be between 8 and 14Å.
Famous quotes containing the words contact and/or number:
“Words, words, words! They shut one off from the universe. Three quarters of the time one’s never in contact with things, only with the beastly words that stand for them.”
—Aldous Huxley (1894–1963)
“Mining today is an affair of mathematics, of finance, of the latest in engineering skill. Cautious men behind polished desks in San Francisco figure out in advance the amount of metal to a cubic yard, the number of yards washed a day, the cost of each operation. They have no need of grubstakes.”
—Merle Colby, U.S. public relief program (1935-1943)