: Re: [ccp4bb] anomalous signal of Mn and Ca ions
On Feb 29, 2008, at 10:29, Johan Turkenburg wrote:
Hi,
You need to firstly check that you did the map calculation correctly,
see comments below:
Sun Tang wrote:
Dear All,
In my structures, I want to assign Mn or Ca ions for some densities
February 2008 10:06
To: CCP4BB@JISCMAIL.AC.UK
Subject: Re: [ccp4bb] anomalous signal of Mn and Ca ions
On Feb 29, 2008, at 10:29, Johan Turkenburg wrote:
Hi,
You need to firstly check that you did the map calculation correctly,
see comments below:
Sun Tang wrote:
Dear All,
In my
As Ethan mentions, your best bet for an 100% positive ID would be to
collect a dataset above and below the Mn edge and see the anomalous
signal from the Mn atom disappear.
If that is not an option, there is a great paper by George Sheldrick
and friends regards using the Calcium Bond Valence Sum
Hi,
You need to firstly check that you did the map calculation correctly,
see comments below:
Sun Tang wrote:
Dear All,
In my structures, I want to assign Mn or Ca ions for some densities. But
when I did not have anomalous density in CCP4i. I am not sure whether I
was correct. The
On Feb 29, 2008, at 10:29, Johan Turkenburg wrote:
Hi,
You need to firstly check that you did the map calculation
correctly, see comments below:
Sun Tang wrote:
Dear All,
In my structures, I want to assign Mn or Ca ions for some
densities. But when I did not have anomalous density in
Dear All,
In my structures, I want to assign Mn or Ca ions for some densities. But when
I did not have anomalous density in CCP4i. I am not sure whether I was
correct. The following was what I did:
I processed the data with HKL2000 and select anomalous signal in scaling. In
CCP4i,
On Thursday 28 February 2008 19:54, Sun Tang wrote:
Dear All,
In my structures, I want to assign Mn or Ca ions for some densities.
But when I did not have anomalous density in CCP4i.
[snip]
I collected the data at the wavelength of 1 A.
Mn has only about 1e of anomalous
