Hi Nat,
You are correct, when you collect data at the Zinc K-edge, you will should expect Co f' nearly 0 and f'' nearly 3, and Zn f' -8 and f'' 4, respectively.
At the Zinc K-edge, f'' will have a significant contribution of both Zn and Co.
f' mainly have only the contribution of Zn (f'= -8) as Co will be nearly zero.
Thanks,
Joao
From: Nathaniel Echols mailto:[email protected]>
Date: Monday, 20 October 2014 16:18
To: Joao Dias mailto:[email protected]>
Cc: Matteo Colombo mailto:[email protected]>, "[email protected]mailto:[email protected]" mailto:[email protected]>
Subject: Re: [phenixbb] anomalous signal
On Mon, Oct 20, 2014 at 6:48 AM, Joao Dias mailto:[email protected]> wrote:
When you collect data at the Zinc K-edge, you will have a very small component of Co in the f'', since your protein as both Zn and Co.
On the other hand, the f' will still have a significant contribution of both Zn and Co.
I'm confused, isn't this backwards? Based on the plot, Co f'' will still be nearly 3e- at the Zn K-edge, but the f' will be close to zero.
-Nat
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