Min, Wei and Binny, Guobin Luo and Cherayil, Binny J and Kou, SC and Xie, X Sunney (2005) Observation of a power-law memory kernel for fluctuations within a single protein molecule. In: Physical Review Letters, 94 (19).
observe.pdf - Published Version
Restricted to Registered users only
Download (522Kb) | Request a copy
The fluctuation of the distance between a fluorescein-tyrosine pair within a single protein complex was directly monitored in real time by photoinduced electron transfer and found to be a stationary, time-reversible, and non-Markovian Gaussian process. Within the generalized Langevin equation formalism, we experimentally determine the memory kernel K(t), which is proportional to the autocorrelation function of the random fluctuating force. K(t) is a power-law decay, t(-0.51 +/- 0.07) in a broad range of time scales (10(-3)-10 s). Such a long-time memory effect could have implications for protein functions.
|Item Type:||Journal Article|
|Additional Information:||Copyright of this article belongs to The American Physical Society.|
|Department/Centre:||Division of Chemical Sciences > Inorganic & Physical Chemistry|
|Date Deposited:||04 Jun 2010 10:01|
|Last Modified:||19 Sep 2010 06:01|
Actions (login required)