From:	Charles Letner <cletner "at@at" remcure.bmb.wright.edu>
Date:	Tue, 14 Nov 1995 12:50:17 -0500 (EST)
Subject:	Center of coordinates

Hello all,
	This is probably a basic question for anyone who is a
crystallographer.  I'm not and keep wondering about this.  The coordinates
of crystal structure give positive and negative values in the x, y,
and z dimensions (i'm mainly speaking of pdb format files).  This inidates
that the origin of the crystal is located someplace!  What I want to know
is, is there a standard/specification of where the origin is located?
Thanks for your response,
Chuck

Charles Letner
Wright State University
Department of Biochemistry
Dayton, OH 45435
e-mail: cletner - at - remcure.bmb.wright.edu




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