摘要:
A method for amplifying desired nucleic acid molecules by PCR which comprises the steps of isolating and purifying a group of nucleic acid molecules including desired nucleic acid molecules to be amplified, then carrying out PCR while establishing such a condition that the nucleic acid molecules capable of being amplified, except for primers, present in a PCR reaction solution are constituted by only the desired nucleic acid molecules and that the concentration of each primer used is limited to a level of not more than 100 nM; a method for producing a protein in a cell-free protein-synthesis system containing a cell-free extract which comprises using the nucleic acid of a single kind produced by the method described above and a method for establishing a protein library which comprises the steps of separately carrying out the method for amplifying desired nucleic acid molecules by PCR to obtain at least two kinds of nucleic acid molecules and separately carrying out the foregoing method for producing a protein using each of the at least two kinds of the amplified nucleic acids as a template to thus establish a protein library which comprises at least two kinds of proteins encoded by the resulting at least two nucleic acids respectively.
摘要:
Disclosed is a novel means that enables mass production of highly safe fibrinogen at low cost. The transgenic silkworm of the present invention expresses the fibrinogen subunit Aα, Bβ and γ chains in the silk gland cells and produces fibrinogen having coagulation activity in the cocoon filament. Preferably, the transgenic silkworm expresses the subunits in the middle silk gland cells and produces fibrinogen in the sericin layer of the cocoon filament. By recovering fibrinogen from the cocoon of the transgenic silkworm of the present invention, highly safe fibrinogen can be mass-produced at low cost.
摘要:
Disclosed is a novel means that enables mass production of highly safe fibrinogen at low cost. The transgenic silkworm of the present invention expresses the fibrinogen subunit Aα, Bβ and γ chains in the silk gland cells and produces fibrinogen having coagulation activity in the cocoon filament. Preferably, the transgenic silkworm expresses the subunits in the middle silk gland cells and produces fibrinogen in the sericin layer of the cocoon filament. By recovering fibrinogen from the cocoon of the transgenic silkworm of the present invention, highly safe fibrinogen can be mass-produced at low cost.
摘要:
An optical pickup device for reading a signal recorded in an optical disc including a first signal recording layer and a second signal recording layer, comprising: a laser diode configured to emit laser light; and a diffraction grating configured to be applied with laser light emitted from the laser diode, and to generate a main beam including zero order light, and a sub beam including plus first order light and minus first order light, such that a ratio of light amount of the sub beam to that of the main beam is substantially 1:7.