Abstract
In order to gain deeper insight into the interaction mechanism between bovine serum albumin (BSA) and polyethylene glycol (PEG), the present work applied elastic light scattering (ELS) spectroscopy to investigate the interaction between BSA and PEG, and explore the effects of concentration and molecular weight of PEG on the interaction at physiological pH. The results showed that the interaction force existed between linear PEG and spherical BSA molecules was mainly hydrogen bonding. In addition, the apparent binding constant of system was evaluated by model calculation.
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