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Journal of Bioactive and Compatible Polymers
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Fractal Studies on Protein Molecular Chains

Houqiang Li

Department of Physics Sichuan University Chengdu 610064 People's Republic of China

Hu Aming Zhao

Department of Chemistry Sichuan University Chengdu 610064 People's Republic of China

A new method for the calculation of the fractal dimension (D) of a protein molecular chain and the D values of three kinds of protein are re ported. Thirty-nine proteins covering four structural classes of proteins, selected from the protein data bank were computed. It was found that the mean value of fractal dimension of protein increased in order of the local DL < middle mean DM < global DG for the short, middle and long range construc tion, respectively. The D value decreased in order of {alpha} > {alpha}/ß > ({alpha} + ß) > ß for the structural classes of protein molecules. This suggests that the fractal dimension may be used to characterize the tertiary structure of a protein. As a structural quantity it reflects the morphology of a protein chain based on the amino acid sequence.

Journal of Bioactive and Compatible Polymers, Vol. 9, No. 3, 318-326 (1994)
DOI: 10.1177/088391159400900306
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