Abstract: The subject of the present invention is a protein having cytokine type activity, or a precursor of this protein, which comprises the following amino acid sequence (a1): ##STR1## in which Xaa represents Asp or Gly.

Abstract: The invention concerns a new urate oxidase activity protein which has the following sequence (SEQ ID NO:1): ##STR1## optionally preceded by a methionine, or in that it may present a degree of substantial homology with this sequence.The invention is also aimed at medicines containing this protein as well as the genetic engineering implements to obtain it.

Abstract: The invention relates to an artificial promoter for the expression of proteins, especially urate oxidase in yeast, which comprises:a sub-sequence upstream from the TATA component of the sequence of the promoter of the GAL7 gene of Saccharomyces cerevisiae, which comprises the upstream activation sequences UAS1 and UAS2; anda sub-sequence of the sequence of an ADH.sub.2 promoter comprising the TATA component and the transcription initiation region.

Abstract: The invention concerns a new urate oxidase activity protein which has the following sequence:______________________________________ Ser Ala Val Lys Ala Ala Arg Tyr Gly Lys Asp Asn Val Arg Val Tyr Lys Val His Lys Asp Glu Lys Thr Gly Val Gln Thr Val Tyr Glu Met Thr Val Cys Val Leu Leu Glu Gly Glu Ile Glu Thr Ser Tyr Thr Lys Ala Asp Asn Ser Val Ile Val Ala Thr Asp Ser Ile Lys Asn Thr Ile Tyr Ile Thr Ala Lys Gln Asn Pro Val Thr Pro Pro Glu Leu Phe Gly Ser Ile Leu Gly Thr His Phe Ile Glu Lys Tyr Asn His Ile His Ala Ala His Val Asn Ile Val Cys His Arg Trp Thr Arg Met Asp Ile Asp Gly Lys Pro His Pro His Ser Phe Ile Arg Asp Ser Glu Glu Lys Arg Asn Val Gln Val Asp Val Val Glu Gly Lys Gly Ile Asp Ile Lys Ser Ser Leu Ser Gly Leu Thr Val Leu Lys Ser Thr Asn Ser Gln Phe Trp Gly Phe Leu Arg Asp Glu Tyr Thr Thr Leu Lys Glu Thr Trp Asp Arg Ile Leu Ser Thr Asp Val Asp Ala Thr Trp Gln Trp Lys Asn Phe Ser Gly Leu Gln Glu Val Arg Ser His Val Pro Lys Phe Asp Ala Thr Trp Ala Thr Ala Arg Glu Val Thr Leu Lys Thr Phe Ala Glu Asp Asn

Abstract: The invention relates to a signal peptide of the formula:MXKSTLLLLFLLLCLPSWNAGAand X represents a direct bond between M and K, an amino acid selected from the group comprising the 20 amino acids of the genetic code, or a peptide containing 2, 3 or 4 amino acids selected, each independently of the other, from the group comprising the 20 amino acids of the genetic code.

Abstract: DNA sequence participating in the regulation of the expression of a DNA sequence coding for a precursor of a polypeptide.Expression vectors containing such a sequence.Process for the periplasmic production of a polypeptide in a strain of Gram-negative bacteria transformed by one of these vectors.Application to the production of human growth hormone.

Abstract: The invention relates to a microbiological process for the preparation of a protein by culturing a mutant bacterial strain.This process consists in using a bacterial strain carrying a mutation which limits, or even suppresses, the expression of the operons whose transcription depends on the fixation of the cAMP-CRP complex, a DNA sequence coding for a protein precursor having been introduced into the said bacterial strain.