Quantitative two-dimensional gel electrophoresis of proteins in E. coi
l exposed for 60 min to weak, pulsed magnetic fields (1.5 mT peak) sho
w that numerous proteins are both increased and decreased by a factor
of 2 or more. An increase in the levels of two proteins, the a subunit
of DNA-dependent RNA polymerase and NusA, was confirmed by Western bl
ot analysis. (C) 1994 Wiley-Liss, Inc.