Charts and tables showing the number of folds in each fold class associated with only enzymatic (ENZ), only non-enzymatic (nonENZ), and both enzymatic and non-enzymatic functions (Both). The results are shown for all of Swissprot (part A), for just the yeast genome (part B), and for just the E. coli genome (part C). The results for individual domains in a minimum set of SCOP domains also support these tendencies (data not shown).