Interaction between two regulatory proteins in osmoregulatory expression of ┣DBomoF(/)-┫DB and ┣DBompC(/)-┫DB genes in ┣DBEscherichia(/)-┫DB ┣DBcoli(/)-┫DB : a novel ┣DBompR(/)-┫DB mutation suppresses pleiotropic defects caused by an ┣DBenvZ(/)-┫DB mutati