Patent ID: 7223575

Claim:
A process for using a genetically modified Zymomonas integrant to produce ethanol from a pentose sugar, comprising: providing a Zymomonas integrant comprising a sequence encoding more than one pentose-sugar fermenting enzymes incorporated by a first integration event of transposition and a second integration event of homologous recombination, wherein said pentose fermenting enzymes comprises xylose isomerase, xylulokinase, transketolase, and transaldolase; adding the integrant Zymomonas comprising said sequence encoding to a feedstock comprising pentose under fermentation conditions; and fermenting the pentose sugar to provide a composition comprising ethanol; said Zymomonas integrant being selected from the group consisting of ATCC 31821-5C Penotaltkt/Pgapxyl-AB and ATCC 31821-5C Pgaptaltkt/Pgapxyl AB.