r~UTTE RWORTH SURFNET: A program for visualizing

The SURFNET program generates molecular surfaces and gaps between surfaces from 3D coordinates upplied in a PDB-format file. The gap regions can correspond to the voids between two or more molecules, or to the internal cavities and surface grooves within a single molecule. The program is particularly useful in clearly delineating the regions of the active site of a protein. It can also generate 3D contour surfaces of the density distributions of any set of 3D data points. All output surfaces can be viewed interac-tively, along with the molecules or data points in question, using some of the best-known molecular modeling pack-ages. In addition, PostScript output is available, and the generated surfaces can be rendered using various other graphics packages