Abstract: Methods for the production of a bacterial toxin such as diphtheria toxin, and methods for producing conjugates of a bacterial toxins, are provided.

Abstract: Methods for producing a conjugate of a bacterial toxin, including diphtheria toxin or CRM197, are provided.

Abstract: Compositions and methods related to periplasmic expression of a toxin including diphtheria toxin or CRM197 are provided herein.

Abstract: Chemically defined media for the industrial-scale culture of Bordetella species.

Abstract: The present invention relates to improved processes for culturing bacteria, in particular to processes for perfusion suspension culturing of bacteria in a fermenter, wherein the culture medium including the bacteria is circulated over a separation system in alternating tangential flow, wherein the separation system removes a filtrate containing inhibitory metabolites from the culture medium.

Abstract: Compositions and methods related to periplasmic expression of a toxin including diphtheria toxin or CRM197 are provided herein.

Abstract: Methods for identifying culture conditions for a cell, the method comprising: (a) obtaining a genome scale stoichiometric metabolic model of the cell, and (b) performing constraint based optimization on the metabolic model of the cell using at least one yield based constraint.

Abstract: A process for fermenting Bordetella species comprising incubating a sample of bacteria of a Bordetella species in a first environment under at least one bvg (Bordetella virulence genes) modulating condition, for at least 5 generations, to produce a mature culture, and then incubating the mature culture in a second environment in the absence of the at least one bvg modulating condition.

Abstract: Polynucleotides are provided herein.

Abstract: Chemically defined media for the industrial-scale culture of Bordetella species.

Abstract: The present invention provides a process for periplasmic expression of a bacterial toxoid comprising the steps of: a) growing a culture of a gram negative host cell in a fermentation medium, wherein the host cell is transformed with a polynucleotide, and wherein the polynucleotide encodes the bacterial toxoid and a periplasmic signal sequence; or providing a gram negative host cell wherein the host cell is transformed with a polynucleotide, the polynucleotide encodes the bacterial toxoid and a periplasmic signal sequence and wherein the gram negative host cell comprises the bacterial toxoid expressed in the periplasm; a(i)) inducing expression of the bacterial toxoid; b) maturing the host cell, wherein the maturing step comprises: I) subjecting the host cell to a pH shock; II) incubating the host cell with no feed addition; and/or III) subjecting the host cell to a temperature below ?20° C.; and c) extracting the bacterial toxoid from the host cell wherein the extraction process comprises osmotic shock.

Abstract: The present invention relates to improved processes for culturing bacteria, in particular to processes for perfusion suspension culturing of bacteria in a fermenter, wherein the culture medium including the bacteria is circulated over a separation system in alternating tangential flow, wherein the separation system removes a filtrate containing inhibitory metabolites from the culture medium.

Abstract: A process for fermenting Bordetella species comprising incubating a sample of bacteria of a Bordetella species in a first environment under at least one bvg (Bordetella virulence genes) modulating condition, for at least 5 generations, to produce a mature culture, and then incubating the mature culture in a second environment in the absence of the at least one bvg modulating condition.

Abstract: The present invention relates to a fermentation process comprising a fermentation step of growing a strain of Corynebacterium diphtheriae in medium in a fermenter under conditions of agitation sufficient to maintain a homogenous culture and limited aeration such that pO2 within the culture falls to less than 4% for the majority of the fermentation step.

Abstract: Polynucleotides are provided herein.

Abstract: The present invention relates to a fermentation process comprising a fermentation step of growing a strain of Corynebacterium diphtheria in medium in a fermenter under conditions of agitation sufficient to maintain a homogenous culture and limited aeration such that pO2 within the culture falls to less than 4% for the majority of the fermentation step.