Re: [ccp4bb] How to subtract one electron density map from another

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CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999

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Subject: Re: How to subtract one electron density map from another
From: Ulrich Genick genick {- at -} BRANDEIS {- dot -} EDU
Date: 2007-03-22

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Subject: Re: How to subtract one electron density map from another
From: Paul Emsley emsley {- at -} YSBL {- dot -} YORK {- dot -} AC {- dot -} UK
Date: 2007-03-22

On Thu, 2007-03-22 at 16:06 -0500, Qing Xie wrote:
> I'm trying to get the difference map by subtracting the native electron
> density map from the complex electron density map. MAPMASK has a function
> of ADD/MULT, but I don't know how to use it?
> Any other ways to attack this problem in real space?

use overlapmap
with
ADD 1 -1

presuming your maps are on the correct scale (if not you can use mapmask
to scale (one of) them).

Paul.

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CCP4bb <-- 1999 <-- November 1999 <-- 30 November 1999

Previous message:
Subject: Re: How to subtract one electron density map from another
From: Ulrich Genick genick {- at -} BRANDEIS {- dot -} EDU
Date: 2007-03-22