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anisotropy

Axel T. Brunger brunger at LAPLACE.CSB.YALE.EDU
Tue Aug 29 19:15:52 EST 1995


> When "correcting" FOBS for anisotropy by applying the anisotropic
> B-factors, only the Fs and not the sigmas are changed.  Is there a way
>

   That's an important point.  I would recommend to use the "do"
statement to apply the anisotropic B factor to the sigmas, e.g.,


          do (sigma=$K2*exp(-( $B2_11*h*h*$astar*$astar
                              +$B2_22*k*k*$bstar*$bstar
                              +$B2_33*l*l*$cstar*$cstar
                           +2.0*$B2_12*h*k*$astar*$bstar
                           +2.0*$B2_13*h*l*$astar*$cstar
                           +2.0*$B2_23*k*l*$bstar*$cstar
                      )/4.0)*sigma)


The variables $B, $astar, etc, need to be defined manually.  The next
release of X-PLOR has all these variables internally declared.

Axel Brunger





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