PENTOSE FERMENTING MICROORGANISMS
The invention provides a microbial eukaryotic cell capable of utilizing C5 sugars, in particular xylose. Another objective of the invention is to provide an improved protein sequence to enable eukaryotic cells to degrade C5 sugars. The present invention thus provides protein comprising an amino acid sequence having at least 75% identity, preferably 80% identity, most preferably 90 % identity, most highly preferably 95 % identity to SEQ ID NO. 2 or SEQ ID NO. 8 and having xylose-isomerase activity in a eukaryotic cell.