DNA Transformation matrix

From: Tim Mitchell-1 <Tim_Mitchell-1[ AT ]sbphrd.com>
Subject: DNA Transformation matrix
Date: 2 Apr 96 9:58:06 EDT

 Does anyone out there know the tranformation matrix required to generate the
 duplicate strand of A-form DNA. i.e. from a single strand,I want to make a copy
 of the backbone then rotate n degrees (180 presumably) and translate x
 Angstroms along a vector v to generate the backbone of the duplicate strand.
 It's the distance x and the vector v (relative to a backbone bond preferrably)
 that I'm after.
 Thanks for any help....... Tim Mitchell
 _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
 _/  _____   ____   _/               SmithKline Beecham Pharmaceuticals Ltd  _/
 _/ /  ___\\\\ _ \  _/                                        Brockham Park  _/
 _/ | |___  \\|_| | _/ Tim Mitchell, Computational Chemistry     Betchworth  _/
 _/ \___  | |  _ <  _/ Phone:  [0/+44] 1737 36 4535                  Surrey
 _/
 _/ ____| | | |_| | _/ Fax:    [0/+44] 1737 36 4539                 RH3 7AJ  _/
 _/ \____/  |____/  _/ E-Mail: Tim_Mitchell-1[ AT ]sbphrd.com               U.K.
 _/
 _/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/