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Grandi G, et al. Plasmid vector containing erythromycin promoter of pE 194 modified by replacement of minus 35 region to increase expression of heterologous protein. Japanese Patent 61,257,189 dated Nov 14 1986

Grandi G, et al. Plasmid vector containing erythromycin promoter of pE 194 modified by replacement of minus 35 region to increase expression of heterologous protein. European Patent 195303 dated Sep 24 1986

Grandi G, et al. Plasmid vector containing erythromycin promoter of pE 194 modified by replacement of minus 35 region to increase expression of heterologous protein. German Federal Republic Patent 3,666,838 dated Dec 14 1989

Guido Grandi, personal communication