FIG. 1.

Mismatch repair efficiencies of HeLa cell and Drosophila extracts. The percent repair efficiency was calculated as a function of amount of extract protein for the various types of extracts. Reaction mixtures were incubated for 15 min for HeLa cell extracts and for 2 min for Drosophila extracts. Results are expressed as total repair efficiencies and are based on counts of several hundred to several thousand plaques per data point. A small amount of C · C repair was observed in HeLa cell extracts, but it was not strand specific. The data are plotted as means ± standard errors. Open circles, repair of G · G; closed circles, repair of C · C.