18.10.07 QTree V2.3 released

This version adds the ability to highlight a set of residues by drawing a line around them.


QTree is a program for generating CPK, Ball and Stick and worms pictures of molecules using the quad-tree algorithm. This is a relatively fast method of generating near-photographic quality images though it does not generate shadows. A sense of depth is provided by darkening atoms farther away from the viewer.

QTree provides many facilities including colouring by residue type, atom type, chain, temperature factor, or residue range, rotation, background colouring, modified lighting models and slabs through the structure. An interactive help facility is provided.

Output from the program is in MTV ray-tracer format which may be viewed or converted into other formats using the ImageMagick package.

The QTree package consists of the following programs:

You can read the README file before downloading.

QTree is listed in Linux Links Linux Links Logo


Click the images to get full-sized versions

Antibody HyHEL-5 bound to lysozyme 3hfl
basic p53 bound to DNA
p53 bound to DNA cons
gna 2,4-Deoxy-4-guanidino-5-N-acetyl-neuraminic acid
2,4-Deoxy-4-guanidino-5-N-acetyl-neuraminic acid gna2


QTree is freely available for use by not-for-profit organisations and for commercial organisations (providing they inform the author that they are using it). It may not be distributed without the author's permission, but must be obtained from this site. It is supplied as a gzipped tar file of source code.