Patent ID: 7393669

Claim:
A recombinant, prototrophic micro-organism exhibiting an increased level of galactose uptake rate when cultured on a nutrient source providing galactose, said micro-organism being a Saccaromyces cerevisiae having the ability to grow on minimal medium and over expressing PGM2, which is an enzyme catalysing the conversion of glucose-1 phosphate to glucose-6 phosphate in the galactose uptake and metabolism pathway, compared to a reference micro-organism having a native level of expression of said enzyme and from which the recombinant micro-organism is derived, wherein said over expression of said enzyme is due to said micro-organism having multiple copies of a gene coding for said enzyme or is due to a gene coding for said enzyme being under the control of a genetic control sequence which has been recombinantly introduced and which is not natively associated with said gene.