Chemical Forums
Specialty Chemistry Forums => Biochemistry and Chemical Biology Forum => Topic started by: Jill on May 06, 2004, 12:00:35 PM
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The spatial realtionship of an entired protein molecule would be an example of what protein structure.
Is this correct?
The primary structure of a segment of a polypeptide chain or of a protein is the amino-acid sequence of the polypeptide chain(s), without regard to spatial arrangement (apart from configuration at the alpha-carbon atom). This definition does not include the positions of disulphide bonds, and is, therefore, not identical with "covalent structure" (IUPAC-IUB, 1970). The commonly occurring amino acids are of 20 different kinds which contain the same dipolar ion group H3N+.CH.COO-. They all have in common a central carbon atom to which are attached a hydrogen atom, an amino group (NH2) and a carboxyl group (COOH). The central carbon atom is called the Calpha-atom and is a chiral centre. All amino acids found in proteins encoded by the genome have the L-configuration at this chiral centre.