Abstract: Described herein are compositions and methods for identifying, selecting, or culturing cells comprising a subject nucleic acid sequence of interest. Generally, a nucleic acid comprising a subject nucleic acid and a sequence encoding an enzyme molecule involved in biosynthesis of an amino acid is introduced into a cell. The cell is then grown on media lacking the amino acid, such that cells comprising the introduced nucleic acid are capable of growth. In some instances, the cell further comprises an inhibitor of the enzyme molecule to increase the stringency of the selection.

Abstract: The present disclosure features methods and compositions for modulating lipid metabolism to achieve improved production and quality of recombinant products, such as next generation biologics. Modulation of lipid metabolism as described herein includes, for example, introducing a lipid metabolism modulator described herein to a cell or a cell-free system. Also encompassed by the present disclosure are engineered cells with improved production capacity and improved product quality, methods for engineering such cells, and preparations and mixtures comprising the products from such cells.

Abstract: Disclosed herein are methods and compositions useful for evaluating, selecting, identifying, or making a cell or cell line that has improved production capacity for generating higher yields of products and/or improved capacity to produce higher quality products. Products, as described herein, can include a polypeptide that is endogenously expressed by the cell, a recombinant polypeptide that is not endogenously expressed, or a non-naturally occurring recombinant polypeptide. The methods described herein include modulating, e.g., inhibiting, the protein degradation pathway by using a proteasome inhibitor, an ER-associated degradation (ERAD) inhibitor, or a ubiquitin pathway inhibitor.

Abstract: The present disclosure features methods and compositions for modulating lipid metabolism to achieve improved production and quality of recombinant products, such as next generation biologics. Modulation of lipid metabolism as described herein includes, for example, introducing a lipid metabolism modulator described herein to a cell or a cell-free system. Also encompassed by the present disclosure are engineered cells with improved production capacity and improved product quality, methods for engineering such cells, and preparations and mixtures comprising the products from such cells.

Abstract: The present disclosure features methods and compositions for modulating lipid metabolism to achieve improved production and quality of recombinant products, such as next generation biologics. Modulation of lipid metabolism as described herein includes, for example, introducing a lipid metabolism modulator described herein to a cell or a cell-free system. Also encompassed by the present disclosure are engineered cells with improved production capacity and improved product quality, methods for engineering such cells, and preparations and mixtures comprising the products from such cells.

Abstract: Disclosed herein are methods and compositions useful for evaluating, selecting, identifying, or making a cell or cell line that has improved production capacity for generating higher yields of products and/or improved capacity to produce higher quality products. Products, as described herein, can include a polypeptide that is endogenously expressed by the cell, a recombinant polypeptide that is not endogenously expressed, or a non-naturally occurring recombinant polypeptide. The methods described herein include modulating, e.g., inhibiting, the protein degradation pathway by using a proteasome inhibitor, an ER-associated degradation (ERAD) inhibitor, or a ubiquitin pathway inhibitor.

Abstract: The present disclosure features methods and compositions for modulating lipid metabolism to achieve improved production and quality of recombinant products, such as next generation biologics. Modulation of lipid metabolism as described herein includes, for example, introducing a lipid metabolism modulator described herein to a cell or a cell-free system. Also encompassed by the present disclosure are engineered cells with improved production capacity and improved product quality, methods for engineering such cells, and preparations and mixtures comprising the products from such cells.

Abstract: Provided herein are organic solvent-based processes for the removal of rubber from aged briquettes made from compressed plant matter (briquettes) of non-Hevea plants. Also provided are aged briquettes made from the compressed plant matter of non-Hevea plants where the briquettes have been aged for either various time period after formation and the rubber within the briquette has retained its a molecular weight to within a specified range.

Abstract: Provided herein are organic solvent-based processes for the removal of rubber from non-Hevea plants such as guayule shrubs. By the use of the processes, solid purified rubber can be obtained that contains 0.05-0.5 weight % dirt, 0.2-1.5 weight % ash, and 0.1-4 weight % resin (when it has been dried so as to contain 0.8 weight % volatile matter).

Abstract: A vulcanizable composition of matter comprising a rubber component, a filler, a curative for the rubber, where the rubber component includes a multi-modal polymer including at least two distinct peak molecular weights within a range defined by a lower limit of 80 kg/mole and an upper limit of 500 kg/mole.

Abstract: Provided herein are organic solvent-based processes for the removal of rubber from non-Hevea plants such as guayule shrubs. By the use of the processes, solid purified rubber can be obtained that contains 0.05-0.5 weight % dirt, 0.2-1.5 weight % ash, and 0.1-4 weight % resin (when it has been dried so as to contain 0.8 weight % volatile matter).

Abstract: Provided herein are organic solvent-based processes for the removal of rubber from aged briquettes made from compressed plant matter (briquettes) of non-Hevea plants. Also provided are aged briquettes made from the compressed plant matter of non-Hevea plants where the briquettes have been aged for either various time period after formation and the rubber within the briquette has retained its a molecular weight to within a specified range.

Abstract: A vulcanizable composition of matter comprising a rubber component, a filler, a curative for the rubber, where the rubber component includes a multi-modal polymer including at least two distinct peak molecular weights within a range defined by a lower limit of 80 kg/mole and an upper limit of 500 kg/mole.

Abstract: This invention relates to a method for producing functionalized cis-1,4-polydienes having a combination of a high cis-1,4-linkage content and a high functionality, the resulting polymers and the vulcanized products containing the polymers. The functionalized cis-1,4-polydienes of the present invention are produced by a method comprising the steps of: (1) preparing a reactive polymer by polymerizing conjugated diene monomer with a lanthanide-based catalyst in the presence of less than 20% by weight of organic solvent based on the total weight of monomer, organic solvent, and resulting polymer, where the lanthanide-based catalyst is the combination of or reaction product of (a) a lanthanide compound, (b) an aluminoxane, (c) an organoaluminum compound other than an aluminoxane, and (d) a halogen-containing compound; and (2) contacting the reactive polymer with a functionalizing agent.

Abstract: A method for the continuous production of polydienes, the method comprising the steps of (a) charging a mixture of one or more monomer, catalyst system, and less than 50% weight percent organic solvent based on the total weight of the monomer, catalyst and solvent, into first vessel, (b) polymerizing the monomer to a conversion of up to 20% by weight of the monomer to form a mixture of reactive polymer and monomer, (c) removing the mixture of reactive polymer and monomer from the vessel, and (d) terminating the reactive polymer prior to a total monomer conversion of 25% by weight.

Abstract: There is disclosed a process for producing a conjugated diene-containing polymer wherein a stream comprising conjugated diene monomer and a specified catalyst, that includes a lanthanide compound and an aluminoxane, is passed through an orifice into the reaction zone of a polymerization vessel, maintained under specific pressure conditions to form a cement having a viscosity that allows the cement to be conveyed through a devolatilization zone, where desired.

Abstract: There is disclosed a process for producing a conjugated diene-containing polymer wherein a stream comprising conjugated diene monomer and a specified catalyst, that includes a lanthanide compound and an aluminoxane, is passed through an orifice into the reaction zone of a polymerization vessel, maintained under specific pressure conditions to form a cement having a viscosity that allows the cement to be conveyed through a devolatilization zone, where desired.

Abstract: This invention relates to a method for producing functionalized cis-1,4-polydienes having a combination of a high cis-1,4-linkage content and a high functionality, the resulting polymers and the vulcanized products containing the polymers. The functionalized cis-1,4-polydienes of the present invention are produced by a method comprising the steps of: (1) preparing a reactive polymer by polymerizing conjugated diene monomer with a lanthanide-based catalyst in the presence of less than 20% by weight of organic solvent based on the total weight of monomer, organic solvent, and resulting polymer, where the lanthanide-based catalyst is the combination of or reaction product of (a) a lanthanide compound, (b) an aluminoxane, (c) an organoaluminum compound other than an aluminoxane, and (d) a halogen-containing compound; and (2) contacting the reactive polymer with a functionalizing agent.

Abstract: A method for the continuous production of polydienes, the method comprising the steps of (a) charging a mixture of one or more monomer, catalyst system, and less than 50% weight percent organic solvent based on the total weight of the monomer, catalyst and solvent, into first vessel, (b) polymerizing the monomer to a conversion of up to 20% by weight of the monomer to form a mixture of reactive polymer and monomer, (c) removing the mixture of reactive polymer and monomer from the vessel, and (d) terminating the reactive polymer prior to a total monomer conversion of 25% by weight.

Abstract: A method for the continuous production of polydienes, the method comprising the steps of (a) charging a mixture of one or more monomer, catalyst system, and less than 50% weight percent organic solvent based on the total weight of the monomer, catalyst and solvent, into first vessel, (b) polymerizing the monomer to a conversion of up to 20% by weight of the monomer to form a mixture of reactive polymer and monomer, (c) removing the mixture of reactive polymer and monomer from the vessel, and (d) terminating the reactive polymer prior to a total monomer conversion of 25% by weight.