The following ZIP files contain programs written by Ron Duggleby. The programs available are: DNRPEASY - Nonlinear regression analysis and graphics. DNRP53 - A forerunner to DNRPEASY; in some ways more versatile, but without the graphics. This program is the one described in "Computers in Biology and Medicine" 14, 447-455 (1984). DNRP-RKF - Based on DNRP53 and used to fit regression models that are the solution of a set of differential equations; e.g. where the data consist of time courses but the model is in the form of rate equations. This program is the one described in "Biochimica et Biophysica Acta" 1205, 268-274 (1994). Any questions and comments should be directed to the author. Mail: R.G. Duggleby Centre for Protein Structure, Function and Engineering Department of Biochemistry University of Queensland Brisbane QLD 4072 Australia Phone: +617 3365 4615 Fax: +617 3365 4699 Email: duggleby@biosci.uq.edu.au