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Biophysical Journal 64: 560-564 (1993)
© 1993 the Biophysical Society

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SAXS study of crotapotin at low pH.

J R Abrego, A F Craievich, Y P Mascarenhas and C J Laure

Departamento de Física, Letras e Ciências Exatas/UNESP, SP, Brasil.

ABSTRACT

The structure of crotapotin, a protein extracted, from the venom of the Crotalus durissus terrificus, in solution at pH = 1.5, was studied by SAXS. The experimental results yield structural parameter values of the molecular radius of gyration Rg = 13.6 A, volume v = 16.2 x 10(3) A3 A3 and maximal dimension Dmax = 46 A. The distance distribution function deduced from the scattering measurements is consistent with an overall molecular shape of an oblate ellipsoid of revolution with asymmetry parameter v = 0.45.






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Copyright © 1993 by the Biophysical Society.