作者
Mrityunjoy Mahato, Prabir Pal, Tapanendu Kamilya, Ratan Sarkar, GB Talapatra
发表日期
2010/1/14
期刊
The Journal of Physical Chemistry B
卷号
114
期号
1
页码范围
495-502
出版商
American Chemical Society
简介
In this Article, we report the surface activity of the human globular blood protein, hemoglobin (Hb), at the air/water interface. The Langmuir−Blodgett technique is used for monolayer characterization. The adsorption growth-kinetics study shows that the adsorption process at the air/water interface is involved with two mechanisms: one diffusion with adsorption and the other rearrangement with unfolding. The kinetics is found to be dependent on pH and protein concentration in the subphase. The CD and FTIR studies suggest larger intermolecular aggregate and β-sheet formation in the film lifted from the air/acidic water subphase. In alkaline pH and in isoelectric pH (6.8), not much variation is observed. The FE-SEM images support this observation. The acidic pH induced such conformational changes, and aggregation is explained with the argument of α-helix to β-sheet conversion as well as the competition between …
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M Mahato, P Pal, T Kamilya, R Sarkar, GB Talapatra - The Journal of Physical Chemistry B, 2010