Abstract: Disclosed is an Andrias davidianus cartilage preparation. The Andrias davidianus cartilage enzymatic extract of the present invention is obtained by a method comprising: obtaining cartilage from Andrias davidianus, proteolyzing the obtained cartilage, obtaining a supernatant after the proteolysis, and drying the supernatant. The Andrias davidianus cartilage enzymatic extract and an alcohol-soluble component thereof according to the present invention comprise a cartilage polypeptide, and have the effects of lowering uric acid, or treating hyperuricemia.

Abstract: Recombinant bacteria for producing deoxyviolacein and uses thereof are provided, wherein the recombinant bacteria is obtained by introducing the deoxyviolacein synthesis-related gene cluster into Escherichia coli BL21-CodonPlus (DE3)-RIL or Pseudomonas putida mt-2. The deoxyviolacein synthesis-related gene cluster is obtained by knocking out VioD gene from the violacein synthesis-related gene cluster composed of VioA, VioB, VioC, VioD and VioE, and the nucleotide sequence is as shown in the SEQ ID NO: 1 in the sequence listing. A method for producing deoxyviolacein by fermenting the recombinant bacteria to produce deoxyviolacein by using L-tryptophan as substrate is provided. The method has high efficiency of deoxyviolacein production, the deoxyviolacein produced is convenient to be extracted, and simple to be separated and purified.

Abstract: Recombinant bacteria for producing deoxyviolacein and uses thereof are provided, wherein the recombinant bacteria is obtained by introducing the deoxyviolacein synthesis-related gene cluster into Escherichia coli BL21-CodonPlus (DE3)-RIL or Pseudomonas putida mt-2. The deoxyviolacein synthesis-related gene cluster is obtained by knocking out VioD gene from the violacein synthesis-related gene cluster composed of VioA, VioB, VioC, VioD and VioE, and the nucleotide sequence is as shown in the SEQ ID NO: 1 in the sequence listing. A method for producing deoxyviolacein by fermenting the recombinant bacteria to produce deoxyviolacein by using L-tryptophan as substrate is provided. The method has high efficiency of deoxyviolacein production, the deoxyviolacein produced is convenient to be extracted, and simple to be separated and purified.