2010 Fiscal Year Final Research Report
Dynamics of photoelectric conversion in biological system as studied by high time resolution and high frequency EPR
| Project/Area Number |
21750004
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Physical chemistry
|
|---|
| Research Institution | Tohoku University |
|---|
Principal Investigator |
MATSUOKA Hideto 東北大学, 多元物質科学研究所, 助教 (90414002)
|
|---|
| Project Period (FY) |
2009 – 2010
|
| Keywords | 光合成膜タンパク / 光化学系I / 電子伝達経路 / 高周波パルス時間分解ESR |
|---|
| Research Abstract |
In this work, high time resolution and high frequency ESR experiments were performed for Photosystem I (PSI) from the deuterated cyanobacterium Synechococcus lividus. Spin dynamics were measured by monitoring the electron spin echo signals with different delay times after the laser flash (DAF). Assuming a weakly interacting spin-correlated radical pair, the kinetic curve can be almost fit with two time constants, indicating that the spin dynamics involve two kinds of radical pairs in PSI. It was concluded that bidirectional electron transfer occurs in PSI.
|
