The molecular mobility of scattering particles in water solutions of albumin and $\gamma$-globulin proteins with gold nanoparticles was investigated by the dynamic light scattering method. The dependences of translation diffusion coefficients of particles at various concentrations of the solution components have been obtained. It was revealed that in a wide range of concentrations of the solution components there is no interaction of gold nanoparticles with albumin, whereas gold nanoparticles form complexes with $\gamma$-globulin molecules.
87.14.-g Biomolecules: types
87.15.-v Biomolecules: structure and physical properties
42.62.-b Laser applications
$^1$Department of Molecular Physics, Faculty of Physics, Moscow State University, Moscow, 119991, Russia
$^2$Department of General Physics and Wave Processes, Faculty of Physics, Moscow State University, Moscow, 119991, Russia
$^3$Institute of Biochemistry and Plant and Microorganism Physiology of the Russian Academy of Sciences, 13 prosp. Entuziastov, Saratov, 410049, Russia
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