NOVELTY - A recombinant cell comprising a gene encoding a fatty acid derivative enzyme, where the gene is modified so that the gene is over-expressed; and a gene encoding an acyl-coenzyme A (CoA) dehydrogenase enzyme, where the gene is modified so that expression of the gene is attenuated, where the cell is capable of producing a fatty acid derivative and is modified to include exogenous nucleic acid sequence encoding a fatty acid derivative enzyme, is new.    USE - The recombinant cell is useful for preparing a composition, e.g. biofuel composition; producing fatty acid derivatives; increasing production of fatty acid derivatives; and for producing fatty acid derivatives (all claimed).    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are:    (1) a composition produced by a recombinant cell comprising fatty acid derivatives produced from a recombinant cell, or comprising free fatty acids, fatty esters and free fatty acids, and further comprising less than or equal to about 50 ppm arsenic; less than or equal to about 200 ppm calcium; less than or equal to about 200 ppm chlorine; less than or equal to about 50 ppm copper; less than or equal to about 300 ppm iron; less than or equal to about 50 ppm lead; less than or equal to about 50 ppm manganese; less than or equal to about 50 ppm magnesium; less than or equal to about 0.5 ppm mercury; less than or equal to about 50 ppm molybdenum; less than or equal to about 2% nitrogen; less than or equal to about 200 ppm potassium; less than or equal to about 300 ppm sodium; less than or equal to about 1 ppm sulfur; less than or equal to about 50 ppm zinc; or less than or equal to about 700 ppm phosphorus; or comprising a fatty acid having a double bond at position 7 in the carbon chain (7-8C) from the reduced end of the fatty acid derivative; 5-25C fatty esters; straight chain fatty acid derivatives; branched chain fatty acid derivatives; cyclic moieties; unsaturated; monounsaturated; saturated; a fatty ester that is produced from an alcohol and an acyl-CoA, where the alcohol is 1-18C in length, and the acyl-CoA is 2-26C in length;    (2) a method for producing fatty acid derivatives in a recombinant cell comprising: (a) obtaining the recombinant cell; (b) culturing the recombinant cell; and (c) producing fatty acid derivatives;    (3) a method of increasing production of fatty acid derivatives in a recombinant cell comprising introducing an exogenous nucleic acid encoding a fatty acid derivative enzyme into a cell, and expressing the exogenous nucleic acid, where expression of the nucleic acid in the recombinant cell results in increased production of fatty acid derivatives relative to a non-recombinant cell; or comprising: (a) introducing a nucleic acid construct into a host cell, the nucleic acid construct comprising a nucleic acid sequence encoding a fatty acid derivative enzyme of any of fully defined 1551-1697bp (SEQ ID NO. 2, 3, 6, 9 or 13) given in the specification; and regulatory sequences for expression of the nucleic acid sequence; (b) expressing the nucleic acid sequence; and (c) obtaining the fatty acid derivatives;    (4) a recombinant construct comprising a nucleic acid sequence encoding a fatty acid derivative enzyme, where the nucleic acid sequence is modified to over-express the gene encoding a fatty acid derivative enzyme;    (5) a vector comprising the recombinant construct, or comprising a nucleic acid sequence encoding a fatty acid derivative enzyme operably linked to a promoter that is functional in a host cell, where the nucleic acid sequence comprises a first nucleic acid sequence encoding an acyl-CoA synthase and a second nucleic acid sequence encoding a thioesterase or an ester synthase;    (6) a method for increasing production of fatty acid derivatives in a production host cell, comprising transforming the host cell with a nucleotide sequence so that the production host cell expresses or over-expresses a fatty acid derivative enzyme, where the production of fatty acid derivatives in the production host cell has been increased relative to a production host cell that has not been transformed;    (7) a method of producing fatty acid derivatives comprising: (a) providing a production host cell comprising the vector; and (b) culturing the production host cell to produce fatty acid derivatives;    (8) a fatty acid derivative produced by the method; and    (9) a biofuel composition comprising the fatty acid derivative or the composition.