|
In chemistry, the CPK coloring is a popular color convention for distinguishing atoms of different chemical elements in molecular models. The scheme is named after the CPK molecular models designed by chemists Robert Corey and Linus Pauling, and improved by Walter Koltun. ==History== In 1952, Corey and Pauling published a description of space-filling models of proteins and other biomolecules that they had been building at Caltech.〔Robert B. Corey and Linus Pauling (1953): Molecular Models of Amino Acids, Peptides, and Proteins. Review of Scientific Instruments, Volume 24, Issue 8, pp. 621-627. 〕 Their models represented atoms by faceted hardwood balls, painted in different bright colors to indicate the respective chemical elements. Their color schema included * White for hydrogen * Black for carbon * Sky blue for nitrogen * Red for oxygen They also built smaller models using plastic balls with the same color schema. In 1965 Koltun patented an improved version of the Corey and Pauling modeling technique.〔 Walter L. Koltun (1965), ''Space filling atomic units and connectors for molecular models''. U. S. Patent 3170246. 〕 In his patent he mentions the following colors: * White for hydrogen * Black for carbon * Blue for nitrogen * Red for oxygen * Deep yellow for sulfur * Purple for phosphorus * Light, medium, medium dark, and dark green for the halogens (F, Cl, Br, I) * Silver for metals (Co, Fe, Ni, Cu) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「CPK coloring」の詳細全文を読む スポンサード リンク
|