Abstract: Described are compositions and methods relating to the over-expression of sugar transporter-like polypeptides to reduce the amount of glycerol and acetate produced by modified yeast having an exogenous pathway that cause it to produce more ethanol and acetate than its parental yeast.

Abstract: Described are compositions and methods relating to modified yeast cells that over-express ?-ketoglutarate dehydrogenase (K.GD2). Die modified yeast cells produce increased amounts of ethanol compared to otherwise identical parental yeast cells. Such yeast cells are particularly useful for large-scale ethanol production from starch substrates.

Abstract: Described are compositions and methods relating to modified yeast that over-expresses the J-protein, JID1. The yeast produces an increased amount of ethanol compared to otherwise identical parental cells. Such yeast is particularly useful for large-scale ethanol production from starch substrates.

Abstract: Described are compositions and methods relating to phosphotransacetylase (PTA) genes that improve ethanol production in yeast harboring an engineered PKL pathway, and yeast expressing these PTA genes. Such yeast is particularly useful for large-scale ethanol production from starch substrates, where acetate in an undesirable by-product.

Abstract: Described are compositions and methods relating to the over-expression of sugar transporter-like polypeptides to reduce the amount of glycerol and acetate produced by modified yeast having an exogenous pathway that cause it to produce more ethanol and acetate than its parental yeast.

Abstract: Mutant delta-5 desaturases, having the ability to convert dihomo-gamma-linolenic acid [DGLA; 20:3 omega-6] to arachidonic acid [ARA; 20:4 omega-6] and/or eicosatetraenoic acid [ETA; 20:4 omega-3] to eicosapentaenoic acid [EPA; 20:5 omega-3] and possessing at least one mutation within the HPGG (SEQ ID NO:7) motif of the cytochome b5-like domain and at least one mutation within the HDASH (SEQ ID NO:8) motif are disclosed. Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding delta-5 desaturases, along with a method of making long chain polyunsaturated fatty acids [“PUFAs”], are also disclosed.

Abstract: Mutant delta-5 desaturases, having the ability to convert dihomo-gamma-linolenic acid [DGLA; 20:3 omega-6] to arachidonic acid [ARA; 20:4 omega-6] and/or eicosatetraenoic acid [ETA; 20:4 omega-3] to eicosapentaenoic acid [EPA; 20:5 omega-3] and possessing at least one mutation within the HPGG (SEQ ID NO:7) motif of the cytochome b5-like domain and at least one mutation within the HDASH (SEQ ID NO:8) motif are disclosed. Isolated nucleic acid fragments and recombinant constructs comprising such fragments encoding delta-5 desaturases, along with a method of making long chain polyunsaturated fatty acids [“PUFAs”], are also disclosed.