Souches de micro-organismes dont l'operon phor/phop est inactive pour la mise en oeuvre d'un procede de surproduction de metabolites, notamment a activite antibiotique ou enzymatique

The invention relates to the use of micro-organism strains producing useful compounds provided with an inactive phoR/phoP operon for carrying out a method for stimulating the production of said useful compounds by means of said transformed strains.