摘要:
This invention relates to a DNA encoding a fusion protein of formula (I) [Y]-[X1]-[B-chain]-[X2]-[Linker]-[X3]-[A-chain] (I) wherein Y is a leader peptide sequence for the expression and secretion of the protein, comprising at least one amino acid residue; X1 is an amino acid sequence which is cleavable enzymatically or chemically; B-chain is the amino acid sequence of insulin B chain; X2 is an amino acid sequence which is cleavable enzymatically; Linker is a linker sequence comprising at least one amino acid residue; X3 is an amino acid sequence which is cleavable enzymatically; and A- chain is the amino acid sequence of insulin A chain, and to a method for producing insulin using an expression system containing the DNA in high efficiency and high yield.
摘要:
The invention relates to a DNA that enables co-expression of a protein disulfide isomerase and a polypeptide having disulfide bonds. The invention further relates to a process of producing polypeptides using the DNA and a process of enhancing the efficiency of formation of correct disulfide bond in an expression system of a gene recombinant polypeptide having disulfide bonds.
摘要:
This invention relates to a DNA comprising a nucleotide sequence encoding a fusion protein, wherein the fusion protein comprises: a sequence of signal peptide for Bacillus cell wall protein (CWP); a tag sequence for separation and purification of the fusion protein; a linker sequence; a sequence for chemical or enzymatic cleavage; and an exogenous polypeptide sequence, the sequences being linked in order, the signal peptide, tag and linker being optional sequences; and wherein the nucleotide sequence encoding a fusion protein is ligated to 3′-end of a nucleic acid sequence comprising a Bacillus promoter region; to a vector comprising the DNA; to a bacterium belonging to the genus Bacillus comprising the vector; and to a process for preparation of a useful polypeptide by culture of the bacterium.
摘要:
The present invention provides PCR primers with which sexing of bovine embryos can be easily attained and provides a practical, rapid and reliable method for determining the sex of bovine embryos using these primers. The methods for determining the sex of the bovine embryos are characterized by discriminating PCR products which are obtained by amplifying specific DNA sequences by PCR with pairs of male-specific and gender-neutral primers. These primers are derived from DNAs which specifically hybridize to the bovine male genome and from DNAs which gender-neutrally hybridize to both bovine male and female genomes.
摘要:
A DNA which encodes a fused protein containing an insulin precursor of the overexpression secretion type for producing transgenic insulin, and a method of producing insulin with the use of this DNA.
摘要:
The present invention provides PCR primers with which sexing of bovine embryos can be easily attained and provides a practical, rapid and reliable method for determining the sex of bovine embryos using these primers. The methods for determining the sex of the bovine embryos are characterized by discriminating PCR products which are obtained by amplifying specific DNA sequences by PCR with pairs of male-specific and gender-neutral primers. These primers are derived from DNAs which specifically hybridize to the bovine male genome and from DNAs which gender-neutrally hybridize to both bovine male and female genomes.
摘要:
A tensioner assembly includes a pulley arm pivotable about a pivot shaft, and a tension pulley mounted on the pulley arm at its end remote from the pivot shaft and pressed against a belt to keep the tension of the belt. The tension pulley is rotatably mounted around a base portion of the pulley arm through a rolling bearing with the inner surface and axial rear end surface of the bearing inner race in contact with the outer peripheral surface of the base portion and an end surface of a shoulder of the base portion, respectively. The base portion has an axial through hole formed with an internal thread on its inner surface. A support bolt is threaded into the through hole from the axial front end to press the rolling bearing against the end surface of the shoulder. The internal thread has an axial front end located in the vicinity of, or axially rearwardly of, the end surface of the shoulder.
摘要:
Provided are a low-noise, high-performance multiblade centrifugal fan that suppresses interference between rotational flows generated within extension sections that are extended in a rotation-axis direction at upper and lower end surfaces of a scroll casing, and an air conditioner equipped with the same. In a multiblade centrifugal fan having an impeller disposed in a rotatable manner about a rotation shaft within a scroll casing having a flow path whose cross section gradually increases in a rotational direction, at least one of upper and lower end surfaces of the scroll casing serves as an inclined end surface that is extended in the extending direction of the rotation shaft such that an extended height thereof gradually increases in the rotational direction from a scroll start position, and a stepped section extending in the rotational direction is provided between the inclined end surface and an inner-peripheral side surface of an extension section.
摘要:
In a multi-blade centrifugal fan in which an impeller is provided in a scroll casing in a freely rotatable manner, the scroll casing is provided with an axially expanded portion that forms an air channel at a bottom surface thereof which is expanded in a rotation-axis direction at a radially outer side of an annular flange portion which supports the impeller; and is provided, in a region of an outlet between a tongue portion and a spiral-end portion of the scroll casing in the axially expanded portion, with a protrusion that protrudes radially outward from a radially inner side surface by a predetermined amount so as to directly face an airflow in a circumferential direction.
摘要:
In a vehicle heat-exchange module in which a fan unit is provided at the downstream side of a rectangular heat exchanger, and the fan unit is provided with a shroud having a bell-mouth and an annular opening, a propeller fan that is disposed in the annular opening, and a fan motor that rotationally drives the propeller fan, the fan unit is a unit having a single-fan configuration in which motor input power is at a predetermined level or less, and the propeller fan is provided with two sets of winglets that are respectively constructed upright, with a prescribed gap therebetween in the radial direction, along the circumferential direction on both a pressure surface and a suction surface of the root side of the blades.