摘要:
A convenient and effective method for amplifying a nucleic acid sequence characterized by effecting a DNA synthesis reaction in the presence of chimeric oligonucleotide primers; a method for supplying a large amount of DNA amplification fragments; an effective method for amplifying a nucleic acid sequence by combining the above method with another nucleic acid sequence amplification method; a method for detecting a nucleic acid sequence for detecting or quantitating a microorganism such as a virus, a bacterium, a fungus or a yeast; and a method for detecting a DNA amplification fragment obtained by the above method in situ.
摘要:
Antibiotic TKR2999 having the following physicochemical properties: (1) the m/z value ([M+H] ) is 971 as determined by FAB mass spectrometry, (2) the molecular formula is C44H78N10O14 and the m/z value ([M+H] ) is 971.5776 as determined by high-resolution FAB mass spectrometry, (3) the ultraviolet absorption spectrum (as determined in methanol) has a terminal absorption, (4) the main absorption wavenumbers (cm ) of infrared absorption spectrum (as determined by the KBr method) are 3320, 2920, 1680, 1540, 1210, 1140, 840, 800 and 720, (5) aspartic acid, threonine, serine, glycine, alanine, beta -alanine and ornithine are detected in the amino acid analysis based on the ninhydrin reaction, and (6) it is soluble in methanol but difficultly soluble in hexane, chloroform and water; or pharmacologically acceptable salts thereof. These novel substances are useful as remedies for mycosis.
摘要:
A process for producing a target protein at low temperature, comprising inducing expression of not only a vector having introduced therein a gene coding for the target protein but also a vector having a chaperone gene introduced therein.
摘要:
A thermostable DNA polymerase-related factor promoting the DNA synthesizing activities of DNA polymerases; a thermostable DNA polymerase-related factor having the activity of binding to DNA polymerases and a process for producing the same; genes encoding the above DNA polymerase-related factors; a method for synthesizing DNAs wherein DNA polymerases are used in the presence of the above DNA polymerase-related factors; and kits containing the above DNA polymerase-related factors. Use of these DNA polymerase-related factors makes it possible to provide DNA synthesis systems and DNA amplification systems in vitro which are superior to the conventional ones.
摘要:
Sphingosine derivatives capable of regulating the function of sphingolipids. The sphingosine derivatives are represented by general formula (I) wherein R and R are the same or different and each represents hydrogen, C1-4 alkyl, or C2-5 acyl; R and R are the same or different and each represents hydrogen or hydroxyl, or R and R in combination represent a covalent bond; and X represents -(CH2)n-CO-NH-CH(R )-R or-(CH2)m-O-CO-CH(R )-R .
摘要:
Production of efficiently producing agaro-oligosaccharide; a polypeptide having an agarase activity which is usable in, for example, efficiently extracting a substance such as a nucleic acid from an agarose gel; the amino acid sequence of the polypeptide; a gene encoding the polypeptide; a process for producing the polypeptide; a process for producing agaro-oligosaccharide; and a process for extracting a substance such as a nucleic acid from an agarose gel.
摘要:
A plasmid vector characterized by having a promoter sequence that can be recognized by an RNA polymerase which is not inherent in a host and that controls the expression of target genes and a replication origin that increases the number of copies under the induction by foreign factors; methods of expression and isolation of target genes by using the vector; a polypeptide having the activity of an AccIII restriction enzyme; and a DNA encoding the polypeptide. The invention provides for the first time a plasmid vecto r which can introduce a foreign target gene encoding proteins which are fatal or noxious to hosts into said hosts, a method of efficiently expressing the proteins by using the vector, and also a method of permitting a restriction enzyme gene constituting a restriction-modification system to be isolated even in the absence of a modification enzyme gene, which has been difficult according to prior art.
摘要:
The present invention relates to a method for labeling a nucleic acid characterized in that a ratio of signal intensities of each of labels of the labeled nucleic acids prepared from the same nucleic acid used as a template is substantially the same, irrelevant to the kinds of nucleic acids used as the template, a labeled nucleic acid prepared by the method, and a kit used for the method.
摘要:
According to the present invention, there is provided a therapeutic agent or prophylactic agent that is effective for a disease requiring enhancement of nerve growth factor production for treatment or prevention, comprising as an effective ingredient an aqueous extract of mushrooms. These agents are usable in the treatment or prevention of a disease requiring enhancement of nerve growth factor production such as dementia or nerve disorder. In addition, according to the present invention, there is provided an enhancing agent for growth factor production, or a food, beverage or feed for enhancing nerve growth factor production, each comprising the above-mentioned effective ingredient. According to the food or beverage, by taking as a foodstuff on a daily basis, the symptoms of a disease requiring enhancement of nerve growth factor production can be ameliorated or the like. In addition, the feed is useful for maintaining homeostasis of a living body by its enhancing action for nerve growth factor production.