TECHNOLOGY FOCUS - BIOLOGY - Preparation (Claimed): Growing a bacterial, fungal or yeast cell involves culturing the bacterial, fungal or yeast cell under conditions that allow for the growth of the bacterial, fungal or yeast cell. Preferred Cell: The strain comprises the chromosomal integration of chromosomal integration of a fucO-ucpA construct comprising SEQ ID NO: 14 (as available on WIPO website, Sequences not defined here may be found at ftp://ftp.wipo.net/pub/published pct sequences/publication) into the gene encoding acetate kinase (ackA) of the bacterial strain in combination with the deletion of the gene encoding yqhD. The strain comprises the chromosomal integration of chromosomal integration of a fucO-ucpA construct into the gene encoding acetate kinase (ackA) of the bacterial strain in combination with chromosomal integration of a gene encoding pntAB behind the adhE promoter (adhEwpntAB; SEQ ID NO: 13 containing 3732 base pairs as given in the specification). The strain further comprises a plasmid comprising a gene encoding fucO operably linked to a promoter and/or a gene encoding fucO integrated into the chromosome of the bacterial strain and operably linked to a promoter native to the bacterial strain. The strain comprises a gene encoding fucO integrated into the chromosome of the bacterial strain and operably linked to a promoter native to the bacterial strain. The isolated bacterial, fungal or yeast cell comprises fucO-cpA construct, where the fucO-cpA construct encodes a lactaldehyde reductase and UcpA oxidoreductase activity. The bacterial cell is a Gram-negative or a Gram-positive bacterial cell. The Gram-negative bacterial cell is a bacterial cell selected from the genera of Escherichia, Zymomonas, Acinetobacter, Gluconobacter, Geobacter, Shewanella, Salmonella, Enterobacter or Klebsiella and the Gram-positive bacteria is a bacterial cell selected from the genera of Bacillus, Clostridium, Corynebacterial cell, Lactobacillus, Lactococcus, Oenococcus, Streptococcus and Eubacterial cell. The bacterial cell is Escherichia coli or Klebsiella oxytoca. The bacterial cell is selected from Thermoanaerobes, Bacillus spp., Paenibacillus spp. or Geobacillus spp.. The yeast cell is Candida, Hansenula, Kluyveromyces, Pichia, Saccharomyces, Schizosaccharomyces, or Yarrowia cell. The yeast cell is Kluyveromyces lactis, Saccharomyces carlsbergensis, Saccharomyces cerevisiae, Saccharomyces diastaticus, Saccharomyces douglasii, Saccharomyces kluyveri, Saccharomyces norbensis, Saccharomyces oviformis, or Yarrowia lipolytica. The fungal cell is Acremonium, Aspergillus, Aureobasidium, Bjerkandera, Ceriporiopsis, Chrysosporium, Coprinus, Coriolus, Cryptococcus, Filibasidium, Fusarium, Humicola, Magnaporthe, Mucor, Myceliophthora, Neocallimastix, Neurospora, Paecilomyces, Penicillium, Phanerochaete, Phlebia, Piromyces, Pleurotus, Schizophyllum, Talaromyces, Thermoascus, Thielavia, Tolypocladium, Trametes, or Trichoderma cell. The fungal cell is Aspergillus awamori, Aspergillus foetidus, Aspergillus fumigatus, Aspergillus japonicus, Aspergillus nidulans, Aspergillus niger, Aspergillus oryzae, Bjerkandera adusta, Ceriporiopsis aneirina, Ceriporiopsis caregiea, Ceriporiopsis gilvescens, Ceriporiopsis pannocinta, Ceriporiopsis rivulosa, Ceriporiopsis subrufa, Ceriporiopsis suhvermispora, Chrysosporium inops, Chrysosporium keratinophilum, Chrysosporium lucknowense, Chrysosporium merdarium, Chrysosporium pannicola, Chrysosporium queenslandicum, Chrysosporium tropicum, EXAMPLE - No suitable example given.