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I am surprised if the numbers are wrong, maybe your chosen superposition isn't the same as that used for superpose  - there are 2 methods available - are you using the secondary structure matching, or the assigned residue match?
 Eleanor dodson
On 5 Aug 2012, at 15:17, Zhou, Tongqing (NIH/VRC) [E] wrote:

> Dear All,
>  
> I am trying to obtain the pairwise Ca-distances between corresponding residues of two antibody light chains. CCP4 Superpose can output the distances in the log file, but the numbers seem to be wrong when examed by eye. Is there a way to calculate the pairwise distance between two pdb?
>  
> Thanks,  
>  
> Tongqing
>  
> Tongqing Zhou, Ph.D.
> Staff Scientist
> Structural Biology Section
> Vaccine Research Center, NIAID/NIH
> Building 40, Room 4609B
> 40 Convent Drive, MSC3027
> Bethesda, MD 20892
> (301) 594-8710 (Tel)
> (301) 793-0794 (Cell)
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