*** For details on how to be removed from this list visit the *** *** CCP4 home page http://www.ccp4.ac.uk *** Curves: http://www.ibpc.fr/UPR9080/Curindex.html Freehelix: http://ndbserver.rutgers.edu/NDB/ftp/NDB/programs/freehelix98/ 3DNA: http://rutchem.rutgers.edu/~xiangjun/3DNA/index.html I recommend 3DNA. Cheers! Ho-Leung Ng UC Berkeley