Hi Mark,
for the exact definition look, for example, formula #4 in this paper:
J. Appl. Cryst. (1996). 29, 741-744
For more background look references mentioned there:
(Luzzati, 1953; Main, 1979;Vijayan, 1980; Read, 1986).
Note the essential message in this paper: the values m and D (=alpha)
must be computed using "test" reflections.
This is exactly what implemented in PHENIX (maps output by phenix.refine).
Pavel.
On 7/5/2008 12:39 PM, Mayer, Mark (NIH/NICHD) [E] wrote:
Hi,
What do m and D indicate in the Fourier coefficients for a 2mFo-DFc map?
I've dug a bit in web and CCP4 doc but not found an explanation, though I'm
sure its there.
Thanks,
Mark
