Further to what Nat wrote which I completely agree with, you should tell us the following:
1. Expecting signal of a Calcium atom and expected signal of a Magnesium atom. 2. Are there any intrinsic anomalous scatterers in the structure that you trust such as sulfurs from methionines and cysteines or even selenium at selenomethionines? What are their expected signals and do you see those signals? If not, why not? Basically, these should give one a positive control which they can check their experiment with. ________________________________ From: CCP4 bulletin board [CCP4BB@JISCMAIL.AC.UK] on behalf of Faisal Tarique [faisaltari...@gmail.com] Sent: Monday, April 21, 2014 5:36 PM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] anomalous signal for Mg and Calcium Dear all Just in the continuation ...