| 摘要 |
An isolated Bifidobacteria DNA fragment comprises nucleic acid selected from sequence ID No. 1, sequence ID No. 2 or sequence ID No. 3. A protein having sequence ID No. 4, sequence ID No. 5, sequence ID No. 6, sequence ID No. 7, sequence ID No. 8 or sequence ID No. 9 is also disclosed as are DNA fragments comprising sequence ID No. 10 or 11 and proteins encoded thereby. A two-component signal transduction system comprises a gene encoding sequence ID No. 4 and a gene encoding sequence ID No. 5, a gene encoding sequence ID No. 6 and a gene encoding sequence ID No. 7 or a gene encoding sequence ID No. 8 and a gene encoding sequence ID No. 9. The Bifidobacteria may be Bifidobacterium infantis UCC35624.
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