[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [ccp4bb]: REVISE/ECALC//RANTAN/FFT
*** For details on how to be removed from this list visit the ***
*** CCP4 home page http://www.ccp4.ac.uk ***
Personally, I would go straight to SnB or/and ShelxD, both truly
impressive programs. They also take care of E-calculation (ShelxD
In the same vein, it really helps to have a really excellent (highly
redundant) peak dataset -- in my experience, that's better for solving
substructures than trying to combine somehow two or three MAD datasets of
average qualilty. Spend the crystal lifetime collecting that peak
instead. [I anticipate that statement will unleash a storm of protest...
oh well.] One wavelength (SAD) with solvent flattening is, however,
frequently enough to give interpretable maps as well (with Sharp+solomon,
Not exactly a direct answer to your question, but whatever :)
> Dear All,
> We have stumbled upon a difficult MAD solution (or non solution as yet).
> We are experimenting with RANTAN. Can I check the the FM_RE calculated
> by REVISE is converted to EM_RE by ECALC which is on its own fed to
> To find heavy atom sites, one then calculates a map using
> F1=EM_RE PHI=PHIbest_rantan and peaksearches it.
> What I am unsure of is the EM_RE quantity, although derived from anomalous
> diffs, it is entered into FFT as F not DANO.
> While I am on, does anyone have any thoughts or advice about what to play
> with RANTAN and what constitutes something to get encouraged by?
> James H. Naismith | Research mailto:email@example.com
> Centre for Biomolecular Sciences | Teaching mailto:firstname.lastname@example.org
> BMS Laboratories | Office: 1334-463792 (24 hr)
> The North Haugh | Lab : 1334-463776
> The University | Fax : 1334-467229
> St. Andrews | In UK add 0 to start of number
> Fife Scotland | Overseas add 44 to start of number
> U.K., KY16 9ST | www http://speedy.st-and.ac.uk/