Abstract
Change of a-helical structure of heme protein (Hb) to a b-sheet and random coil conforma- tion because of the interaction of glycine capped gold nanoparticles (20-60 nm) as observed from attenua- tion total reflectance, absorption, Fourier transform infra red, and Circular Dichroism spectroscopy has been reported in this article. Upon interaction, protein takes a cylindrical shape of length 12 lm and diameter 0.35 lm as revealed from scanning electron micros- copy and transmission electron microscopy. The Selected-Area Electron beam Diffraction pattern shows change of crystalline structure in GNP to amorphous nature with the interaction of Hb.
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