Back-transforming maps

Gordon Webster gwebster at imb-jena.de
Fri Mar 7 04:55:26 EST 1997


Dear X-plorers

I would like to know if it is possible to back-transform a map in
X-PLOR ie. to calculate structure factors directly from a map instead
of from an atomic model. Can I use something like a "do(var=ft(map1))"?

I know that the SFALL program in CCP4 can do this, but this program
seems to be rather exigent with regard to the map grid, and if I
try to satisfy these requirements in X-PLOR, I run out of storage
when I try to calculate the map.
 
I need to work with X-PLOR maps because I am using some home-grown
software of my own to manipulate the maps, and I do not have the time
right now to rewrite it. One solution would be to switch back and
forth between X-PLOR and CCP4 maps via e.g. MAPMAN, but I would like to
avoid this if possible, and the reason I wrote my own map modification
software in the first place was to have complete control over the
data points in my maps.

Any help would be warmly received.

Gordon
 

/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\

Gordon Webster 				Phone: +49-3641-65-6070   
Institute of Molecular Biotechnology	Fax:   +49-3641-65-6062
Department of Structural Biology	email: gwebster at imb-jena.de
and Crystallography
Beutenbergstrasse 11, Postfach 100813,
D-07708 Jena, Germany

PGP public key:

-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: 2.6.3i

mQCNAzKAnUUAAAEEAL3+q+F4DKNn+v+baeHVxe09WzIIxXsAORrCpNS5vPNEgFKd
rEUJZqWHD39yDu5aTSHGMYefCRWkozBIbv7aJAYhuqMEAY+r/xHte//Jqwm/+0JB
oWzNIzWsQIL9mVDajX+oBIv6TfMkfjpkkuBCgjuOgWNDbeeWMqSEVhK3W5qFAAUR
tCVHb3Jkb24gV2Vic3RlciA8Z3dlYnN0ZXJAaW1iLWplbmEuZGU+iQCVAwUQMoCd
RaSEVhK3W5qFAQGKkgQAuUKEwsWo2yvgytxlxRHrtdK8eoI8NEQc6U/U/zdIGKIe
8HK2SVLYdHwh3mBcvh1z/6ddjT5GEiB+JqrhgzAg/6aFjGWFOBlvhDvLe9TM30ys
sS5I7btS6VKU5JpECWWTrO2es9dTev1PuDrt5aRs/tgnkAbFvZ2sM4wPv5KeeCE=
=xprk
-----END PGP PUBLIC KEY BLOCK-----

\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/




More information about the X-plor mailing list