摘要:
It is intended to provide an anti-inflammatory agent made from a highly safe material which can be daily taken as a food, an agent for preventing or ameliorating allergic diseases and a functional food having the above-mentioned effects. The anti-inflammatory agent contains an α-bond galactooligosaccharide as the active ingredient. The agent for preventing or ameliorating allergic diseases contains an α-bond galactooligosaccharide as the active ingredient. The functional food contains an α-bond galactooligosaccharide as the active ingredient. As such α-bond galactooligosaccharide, use can be made of a product synthesized by the dehydration condensation reaction by α-galactosidase with the use of galactose or galactose-containing substance as a substrate.
摘要:
A &bgr;-fructofuranosidase gene coding for a protein having an amino acid sequence described in Seq. I.D. No. 1 in the Sequence Listing. The gene enables production of &bgr;-fructofuranosidase on a large scale more easily and less dependently on the productivity of microorganisms than the production by cultivation of the microorganisms. Also, the &bgr;-fructofuranosidase gene is useful for the development of variant enzymes that have increased heat resistance and transfer ratio by means of genetic engineering techniques.
摘要:
Disclosed are (1) a novel galactosyl-cyclodextrin having a galactosyl group as bonded to the hydroxyl group of the glucosyl group of a cyclodextrin via an .alpha.-bond and a method of producing said galactosyl-cyclodextrin; (2) a novel galactosyl-cyclodextrin having a galactosyl group as bonded to the hydroxyl group of the glucosyl group of a cyclodextrin via a .beta.-bond and a method of producing said galactosyl-cyclodextrin; and (3) a novel mannosyl-cyclodextrin having a mannosyl group as bonded to the hydroxyl group of the glucosyl group of a cyclodextrin via an .alpha.-bond and a method of producing said mannosyl-cyclodextrin. The new branched cyclodextrins are expected to be widely useful in various fields of drug industry, food industry and cosmetic industry.
摘要:
A reagent for determining a-amylase activity, comprising a maltooligosaccharide derivative of the following formula ##STR1## (wherein either one of R.sub.1 and R.sub.2 is .beta.-galactopyranosil and the other is hydrogen, R.sub.3 is a group bonded to the reducing terminal glucose via a bond cleavable by .alpha.-amylase, which becomes a measurable substance upon cleavage of the bond, and n is an integer of 0-2), which does not comprise adjuvant enzymes; and a method for determining .alpha.-amylase activity which comprises use of the reagent. The reagent of the present invention does not require use of any adjuvant enzyme and is stable since the substrate is not exposed to the decomposition by an adjuvant enzyme. The substrate used in the present invention has high affinity for .alpha.-amylase. Thus, the reagent and the determination method of the present invention make it possible to determine .alpha.-amylase activity with high sensitivity.
摘要:
Disclosed is a method of producing a branched cyclodextrin where a liquid containing a cyclodextrin and a branched oligosaccharide is treated with a debranching enzyme. By the method, a branched cyclodextrin having a maltosyl or maltotriosyl group as bonded to the glucose of a CD molecule via an .alpha.-1,6 bond is obtained efficiently.
摘要:
An enzymatic method for the preparation of a fructose-containing oligosaccharide, in which a .beta.-fructofuranosidase obtained by culturing Arthrobacter sp. K-1 (FERM BP-3192) as an enzyme is reacted on sucrose, raffinose or stachyose as the donor in the presence of an aldose or ketose as the receptor. The enzyme is characterized by:(1) activity on sucrose for the transglycosidation of a fructosyl group to the receptor in the presence of a monosaccharide, sugar alcohol, alkyl alcohol, glycoside or oligosaccharide;(2) activity for the decomposition of sucrose, elrose, neokestose, xylsucrose, raffinose and stachyose with inactivity on a saccharide selected from the group consisting of 1-kestose, nistose, inulobiose and levan biose;(3) optimum pH of 6.5 to 6.8 at 40.degree. C. with stability at a pH of 5.5 to 10;(4) optimum temperature of 55.degree. C. at a pH of 6.5 exhibiting at least 70% of residual activity at 60.degree. C.;(5) susceptibility to inhibition by the ions of silver, mercury, zinc, copper and tin;(6) two molecular weights of 52,000.+-.2,500 and 58,000.+-.2,500; and(7) two isoelectric points of pH 4.3 and pH 4.6.
摘要:
A novel method of very efficiently elevating the yield of oligosacchrides containing α-galactosyl, compared with the conventional methods, which comprises treating galactose or a galactose-containing material with a specific α-galactosidase and thus performing a dehydrocondensation reaction at a high substrate concentration. Anti-candida compositions originating in foods, having a high safety and excellent anti-candida effect and not being restricted in the supply, which contain as the active ingredient oligosacchrides obtained by treating galactose or a galactose-containing material with an α-galactosidase and thus performing a dehydrocondensation.
摘要:
Disclosed are novel branched cyclodextrins having any of an N-acetylglucosamine group, a glucosaminyl group, an N-acetylgalactosaminyl group and a galactosaminyl group as bonded to the hydroxyl group of the cyclodextrin ring by .beta.-bonding therebetween, and their salts. The novel branched cyclodextrins are produced by reacting a solution containing a cyclodextrin and an N-acetylglucosamine or N-acetylgalactosamine with an N-acetylhexosaminidase, and optionally deacetylating the resulting product.
摘要:
A method of producing a mannosyl-cyclodextrin having a mannosyl group bonded to the hydroxyl group of the glucosyl group of a cyclodextrin via an alpha-bond. The method includes treating a liquid containing a cyclodextrin and an alpha-mannosyl compound with an alpha-mannosyl transfer agent.
摘要:
The object of the present invention is to provide a microorganism having an excellent ability to specifically oxidize the hydroxymethyl group of glucose, and a method of producing glucuronic acid and/or glucuronolactone by using such a microorganism to directly oxidize glucose, and the invention is directed at a microorganism which produces glucuronic acid directly from glucose and a mutant strain which is capable of specifically oxidizing the hydroxymethyl group of glucose and in which a DNA nucleotide sequence corresponding to 16S rRNA has the nucleotide sequence of SEQ ID NO: 1 in the sequence listing, and the invention is also directed at a method of producing glucuronic acid and/or glucuronolactone by specifically oxidizing the hydroxymethyl group of glucose using the mutant strain, and this invention enables D-glucuronic acid and/or D-glucuronolactone to be produced and furnished easily and safely at a high yield and a low cost.
摘要翻译:本发明的目的是提供一种具有优异的葡萄糖羟甲基氧化能力的微生物,以及通过使用这样的微生物直接氧化葡萄糖来生产葡萄糖醛酸和/或葡糖醛酸内酯的方法,本发明是针对 在从葡萄糖直接生产葡萄糖醛酸的微生物和能够特异性氧化葡萄糖羟甲基的突变菌株,其中对应于16S rRNA的DNA核苷酸序列具有序列表中SEQ ID NO:1的核苷酸序列 本发明还涉及通过使用突变菌株特异性氧化葡萄糖羟甲基来生产葡萄糖醛酸和/或葡糖醛酸内酯的方法,本发明使D-葡萄糖醛酸和/或D-葡糖醛酸内酯能够生产和配制 轻松安全地以高产量和低成本。