摘要:
Novel methods and novel industrial Bacillus strains are provided for enhanced production of serine protease. Plasmid constructs comprising the serine protease gene are introduced into a compatible host, generally a Bacillus already overproducing serine protease. Preferred host cells are those from Bacillus novo sp. PB92 and the preferred serine protease gene also originates from Bacillus PB92. Integration and maintenance of the plasmid in the host cell chromosome can be achieved by including a temperature sensitive origin of replication in the plasmid construct and growing under selective conditions.
摘要:
DNA constructs that are useful for providing secretory expression of heterologous polypeptides in yeast comprising a DNA sequence that includes a Kluyveromyces .alpha.-factor leader sequence linked to the heterologous polypeptide by a yeast processing signal. Constructs employing the K. lactis .alpha.-factor leader and processing signal sequences, with and without spacer, linked to prochymosin are exemplified.
摘要:
Plasmid conferring resistance to streptomycin (Sm.sup.R) and neomycin (Neo.sup.R) upon its host (e.g. a Bacillus, Staphylococcus or Escherichia coli) and which after having taken up a foreign DNA fragment at one of its restriction sites with loss of its Sm.sup.R or Neo.sup.R phenotype, is still capable of replicating and expressing genetic information in its host.
摘要:
A new antibiotic being a yellow, salt-forming weak acid, and its non-toxic, pharmaceutically acceptable salts produced by a novel microorganism called Streptomyces ramocissimus, a sample of which is deposited in the collection of ''''Centraal Bureau voor Schimmelcultures'''' at Baarn, The Netherlands, under No. CBS 190.69, or mutants thereof, which antibiotic possesses growthpromoting properties and is especially useful to be added to animal feed although the antibiotic may also be used for therapeutic purposes.
摘要翻译:一种新的抗生素是一种黄色的盐形成弱酸,以及其无毒的药学上可接受的盐,由称为Streptomyces ramocissimus的新型微生物产生,其样品保藏在Baarn的“Centraal Bureau voor Schimmelcultures” 荷兰,根据CBS 190.69,或其突变体,其抗生素具有生长促进性质,并且特别可用于加入到动物饲料中,尽管抗生素也可用于治疗目的。
摘要:
An enzymatic hydrolysis of a glycosidic substrate containing at least one of the said precursors is performed with at least one enzyme chosen in accordance with the structure of the said precursor, to liberate the corresponding monoglycosides by cleavage at a glycoside bond, and, in a second stage, an enzymatic hydrolysis of the product of the first stage is performed with at least one enzyme other than or identical to that/those of the first stage and designed to liberate the aroma components and aromas by cleavage of the aglycone-carbohydrate linkage bond. A vegetable material derived from a fruit such as grape or an aromatic or flowering plant, as well as their derivatives and by-products, is chosen as a glycosidic substrate. Terepenols such as geraniol, linalol, nerol and the like, terpene polyols and alcohols such as phenyl ethyl alcohol and benzyl alcohol, or the like, are obtained, in particular, as aroma components or aromas.