[3dem] RE: Radius of Gyration from a single particle 3-D model

[Penczek, Pawel A]

Hi,

indeed, I wrote CG 3 while back.  However, strictly speaking neither radius of gyration
nor center of gravity can be computed for EM reconstructed molecules as proper
normalization of densities is not known.  So, it is easy to check that results are arbitrary and
can be modified significantly by renormalization of the structure.

Regards,
Pawel A. Penczek, Ph.D.
Professor
Department of Biochemistry and Molecular Biology
The University of Texas - Houston Medical School
MSB 6.220
6431 Fannin
Houston, TX 77030
USA

phone: 713-500-5416
fax: 713-500-6297
pawel.a.penczek at uth.tmc.edu
http://www.uth.tmc.edu/bmb/faculty/pawel-penczek.html
________________________________________
From: 3dem-bounces at ncmir.ucsd.edu [3dem-bounces at ncmir.ucsd.edu] On Behalf Of Wang, Hongwei [hongwei.wang at yale.edu]
Sent: Tuesday, May 04, 2010 9:22 PM
To: 3dem at ucsd.edu
Subject: [3dem] RE: Radius of Gyration from a single particle 3-D model

For those who have the same question as I, this is an answer from Qiu-Xing:
spider has a program, cg 3

> -----Original Message-----
> From: 3dem-bounces at ncmir.ucsd.edu [mailto:3dem-bounces at ncmir.ucsd.edu] On
> Behalf Of Wang, Hongwei
> Sent: Tuesday, May 04, 2010 12:02 AM
> To: 3dem at ucsd.edu
> Subject: [3dem] Radius of Gyration from a single particle 3-D model
>
> Dear Colleagues,
>
> I am wondering if there's a quick way to calculate the radius of gyration
> from the 3-D model of a single particle reconstruction.
>
> Thanks for your reply.
>
> Hongwei
>
> -------------------------------------
> Hongwei Wang, Ph.D.
> Assistant Professor
> Dept. Molecular Biophysics & Biochemistry
> Yale University School of Medicine
> 333 Cedar Street
> P.O. Box 208024
> New Haven, CT 06520-8024
> 203-785-3322 (O)
>
>
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