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1. A process for preparing L-ornithine, comprising:
a) cultivating in a medium an L-ornithine excreting bacterium selected from the group consisting of Corynebacterium, Bacillus, Streptomyces, Arthrobacter and the Enterobacteriaceae which overexpresses a polynucleotide coding for a polypeptide which has the activity of an L-ornithine exporter and whose amino acid sequence is identical to the amino acid sequence of SEQ ID No. 2 or comprises SEQ ID NO: 2 with a maximum of 25 deletions, insertions, substitutions or N-terminal and/or C-terminal additions of amino acids overall thus producing a fermentation broth, and b) recovering L-ornithine from the fermentation broth, wherein plasmid pEC7lysE, deposited as DSM23239, is excluded for overexpression.
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