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Conformation study on poly( L ‐tyrosine) in dimethyl formamide by small‐angle X‐ray scattering
Author(s) -
Hamada Fumiyuki,
Ishimuro Yoshitaka,
Hayashi Toshio,
Nakajima Akio
Publication year - 1977
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.1977.360161102
Subject(s) - radius of gyration , chemistry , formamide , helix (gastropod) , tyrosine , molecule , small angle x ray scattering , gyration , crystallography , dimethyl formamide , scattering , radius , polymer , organic chemistry , optics , geometry , biochemistry , ecology , physics , mathematics , computer security , solvent , snail , computer science , biology
The size and shape parameters of poly( L ‐tyrosine) in dimethyl formamide were investigated with fractionated samples of different molecular weight by small‐angle X‐ray scattering. The molecular weight, the radius of gyration of the molecule as a whole, the radius of gyration of the cross section, the mass per unit length, and the length of helix molecule were determined. The molecular conformations proposed by Applequist and Pao for poly( L ‐tyrosine) were compared with the experimental results obtained. It was concluded that poly( L ‐tyrosine) exists in a form of the right‐handed α‐helix in dimethyl formamide.