CDD	Database home page	http://www.ncbi.nlm.nih.gov/Structure/cdd/cdd.shtml
CDD help	CDD help documentation	http://www.ncbi.nlm.nih.gov/Structure/cdd/cdd_help.shtml
CDD FTP	CD models, prebuilt search databases	ftp://ftp.ncbi.nih.gov/pub/ mmdb/cdd
CD-Search	Live and precomputed RPS-BLAST	http://www.ncbi.nlm.nih.gov/Structure/cdd/wrpsb.cgi
CDTree/Cn3D	Domain hierarchy viewer and editor	http://www.ncbi.nlm.nih.gov/Structure/cdtree/cdtree.shtml
rpsblast	Stand-alone tool for searching databases of profile models, part of the NCBI toolkit distribution	ftp://ftp.ncbi.nlm.nih.gov/toolbox executables can be obtained from: http://www.ncbi.nlm.nih.gov/BLAST/download.shtml