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R factors and B factors

alex jack alexj_1998 at YAHOO.COM
Mon Oct 26 14:04:10 EST 1998

Dear All: 

Could somebody help me answer these questions:

1. What's generally the acceptable R-factors for a structure, with the
data of 2.5 A; 3.0 A; and 3.5 A.

2. Is it true, that the higher resolution your data has, the lower
R-factors you should get? Or just the way around?

3. What's the significance of the atomic B-factors when you have a low
resolution data, for example, 3.0 A; or 3.5 A.

Any suggestions will be greatly appreciated.

Thank you all in advance


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