Contact number

See also Kissing number in the sphere packing problem

Contact number (CN) is a simple solvent exposure measure that measures residue burial in proteins.^[1] The definition of CN varies between authors, but is generally defined as the number of either C or C atoms with in 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.

See also

• half sphere exposure

References