CRAMER PRT TIME (LBNL)

我们打算获得关于实际氧化还原的更详细的信息 光系统II的锰团簇在不同的S态下的态， 通过MN K-边XANES方法。上的两组XANES数据 当前可用的OEC中的闪存引发的更改(由两个 不同的小组，关于两种不同的制剂)不同意 在MN参与的一些基本方面 S态的各种跃迁中的氧化。这是我们的明确目标 对不同类型的样品进行XANES实验，但 在其他相同的条件下，通过与 另一组。这应该使我们能够解决现有的 不同地区对锰-氧化还原化学的参与程度不同 S-国家过渡，这将是理解 光合作用的水氧化机制。

We intend to acquire more detailed information on the actual redox states of the Mn-cluster of Photosystem II, in the different S-states, by way of Mn K-edge XANES. The two sets of XANES data on flash-induced changes in the OEC presently available (performed by two different groups, on two different kinds of preparations) do not agree with each other in some essential aspects of the involvement of Mn oxidation in the various S-state transitions. It is our specific aim to perform XANES experiments on the different types of samples, but under otherwise identical conditions, by a collaborative effort with the other group. This should enable us to settle the existing discrepancy on the involvement of Mn-redox chemistry in the different S-state transitions, which will be essential for understanding the mechanism of photosynthetic water oxidation.