  The master equation for 12-monomer lattice heteropolymers is solved
numerically and the time evolution of the occupancy of the native state is
determined. At low temperatures, the median folding time follows the Arrhenius
law and is governed by the longest relaxation time. For good folders,
significant kinetic traps appear in the folding funnel whereas for bad folders,
the traps also occur in non-native energy valleys.
