SciProtein from SciVision is a PC program that is a toolkit for proteins and peptides. The five main features are homology, prediction, graphics editor, search and find, and databases and property maps. You should have HyperChem. It interfaces with HyperChem 3.0 or 4.1. The program and database needs 50-80 MB of storage. Excel 5.0 should be available for rapid searches of the PDB. This program is for protein chemists and molecular biologists.