In general, to see what is in each subdirectory, go into it and read the README file. This is done automatically if you are using Mosaic. Here are descriptions of some of the subdirectories. Purcell.tar.Z - Text, Mac Word 5 RTF, and PostScript files relating to: Gerstein (1994) "Purcell's Role in the Discovery of NMR: Contingency versus Inevitability," Am. J. Phys. (in press). ProtEvol/ - Supplementary material relevant to: Gerstein, Sonnhammer, & Chothia (1994). "Volume Changes in Protein Evolution," J. Mol. Biol. (in press). Including: a program to weight sequences to correct for over-representation, manuscript text and figures, and structure-based sequence alignments. Lactoferrin/ - Postscript files relating to the figures in: Gerstein et al. (1993). "Domain Closure in Lactoferrin," J. Mol. Biol. (in press) Ongoing_Research/ - Data files relevant to current ongoing research. These are intended for specfic people. Questions on this directory should be directed to Mark Gerstein (mbg@cb-iris.stanford.edu).