摘要:
The present invention relates to somatotropin analogues with amino acid changes in the alpha-helix 1 regions of said somatotropins, alone or in combination with mutations in the alpha-helix 3 and/or alpha-helix 2 regions, plus combinations with other changes to the native amino acid sequence of somatotropins. The resulting analogues are stable for formulation in sustained release formulations, while maintaining biological activity. Further, methods for conducting site-directed mutagenesis on DNA encoding proteins and/or polypeptide also are provided.
摘要:
The present invention relates to somatotropin analogues with amino acid changes in the alpha-helix 1 regions of said somatotropins, alone or in combination with mutations in the alpha-helix 3 and/or alpha-helix 2 regions, plus combinations with other changes to the native amino acid sequence of somatotropins. The resulting analogues are stable for formulation in sustained release formulations, while maintaining biological activity. Further, methods for conducting site-directed mutagenesis on DNA encoding proteins and/or polypeptide also are provided.
摘要:
On décrit des procédés permettant de produire des particules purifiées d'antigène d'enveloppe de l'hépatite B (HBsAg) dans des cellules de mammifère, qui consistent à faire la culture de cellules de mammifère produisant lesdites particules dans un milieu de culture auquel on a ajouté un sérum exempt de protéines de contamination à poids moléculaire élevé, et à récupérer ensuite les particules purifiées d'antigène d'enveloppe de l'hépatite B. L'extraction par exemple par préfractionnement des molécules ayant un poids moléculaire supérieur à environ 3 x 105 daltons permet de cultiver des cellules dans un milieu de culture contenant des taux élevés de sérum foetal de veau, d'enlever les protéines de contamination à poids moléculaire élevé qui peuvent avoir un effet d'inhibition sur la croissance des cellules, et de simplifier la purification de HBsAg, étant donné que les protéines de contamination à poids moléculaire élevé, qui sont les principaux contaminants, sont extraites par des procédés de purification.
摘要:
Disclosed are bGH and hGH analogs having the activity of the respective naturally occurring substances and a similar amino acid sequence varying from the sequence of the respective naturally occurring substances. Further there are disclosed pharmaceutical and veterinary compositions containing said analogs as well as methods for producing and purifying said analogs.
摘要:
Disclosed is an improved plasmid which upon introduction into a suitable Escherichia coli host cell containing the thermolabile repressor C I , renders the host cell capable, upon increasing the temperature of the host cell to a temerature at which the repressor is destroyed, of effecting expression of a gene encoding superoxide dismutase inserted into the vector, and production of the superoxide dismutase encoded by the gene.
摘要:
The subject invention provides a method for recovering a solution containing purified, enzymatically active Cu-Zn superoxide dismutase or a polypeptide analog thereof having substantially the same amino acid sequence as, and the biological activity of, naturally-occurring Cu-Zn superoxide dismutase from a composition which comprises cells containing Cu-Zn superoxide dismutase or a polypeptide analog thereof. The invention also provides a method of increasing the yield of recovered solutions having an increased concentration of b isoform of an enzymatically-active polypeptide analog of Cu-Zn superoxide dismutase from a composition which comprises cells containing a, b and c isoforms of the polypeptide analog.