摘要:
Cyclopentanone 1,2-monooxygenase (CPMO) from Comamonas (previously Pseudomonas) sp. strain NCIMB 9872 carries out the second step of a degradation pathway that allows the bacterium to use cyclopentanol as a sole carbon source for growth. In the present invention there is reported the localization of the CPMO-encoding gene (cpnB) on a 4.3-kb SphI fragment, the determination of its sequence. The 550-amino acid CPMO polypeptide (Mr, 62,111) encoded by the gene was found to have 36.5% identity with the sequence of cyclohexanone 1,2-monooxygenase (CHMO) of Acinetobacter sp. strain NCIMB 9871. The 62-kDa CPMO was expressed in E. coli as an IPTG-inducible protein.
摘要:
The invention relates to a new strain of Pseudomonas putida (designated as HI-70) and to the isolation, cloning, and sequencing of a cyclododecanone monooxygenase-encoding gene (named cdnB) from said strain. The invention also relates to a new cyclododecanone monooxygenase and to a method of use of the cyclododecanone monooxygenase-encoding gene.
摘要:
In a semiconductor memory device, a plurality of memory cells are arranged in a matrix. Each of the plurality of memory cells is connected to one of a plurality of word lines and is connected to one of a plurality of bit lines such that a plurality of columns are formed from the plurality of memory cells. A word line selecting section selects one of the plurality of word lines based on a first address. A first column selector selects one of the plurality of columns as a first column based on the first address. A second column selector selects another one of the plurality of columns as a second column based on a second address. An address data of a predetermined portion of the first address is not equal to an address data of the second address. An input/output section includes a first sense amplifier and a first buffer. A first read operation is performed to a first memory cell connected to the selected word line and the first column through the first sense amplifier and the first column selector and a first write operation is performed to a second memory cell connected to the selected word line and the second column through the first buffer and the second column selector.
摘要:
A semiconductor memory device includes precharging circuit for supplying a current to selected digit line pair and equalizing circuit for equalizing potential of complementary digit lines forming all of digit line pairs. Only digit line pair selected by a column address input signal is precharged by the precharging circuit. The potentials of the complementary digit lines forming all digit line pairs is equalized respectively by the equalizing circuit after precharging operation.
摘要:
A semiconductor integrated circuit so configured to stop the supplying of an electric power to a logic circuit in a standby mode, thereby to realize a low power consumption, includes a latch circuit characterized in that as the control signal a clock signal is supplied in the active mode, and a signal for creating an information hold condition is supplied in the standby mode, and in that MOSFETs applied with a control signal include a first conductivity type MOSFET having a high threshold and a second conductivity type MOSFET having a low threshold, a voltage amplitude of the control signal being larger than a power supply voltage. The semiconductor integrated circuit can be realized in that the high speed operation in the active mode and the low power consumption in the standby mode are compatible with each other, and it is sufficient if a power switch for the logic circuit is inserted at only either of the high level power supply voltage line side and the low level power supply voltage line side. In addition, the control signals are very few, and a fine timing control for changing over the mode is no longer required.
摘要:
A latch type sense amplifier circuit comprises first and second latch circuits which output the same output signals when a potential difference between a bit line pair is equal to or greater than a predetermined value. The first and second latch circuits output different output signals when the potential difference between the bit line pair is less than the predetermined value. The latch type sense amplifier circuit further comprises a comparison result signal generating circuit which compares the output signals from the first and second latch circuits and outputs a signal indicative of the comparison result.
摘要:
A semiconductor integrated circuit includes a power supply circuit having a global source line VCC, a local source line QVCC coupled to VCC by a source switching transistor, and a global ground line VSS, a low-threshold logic (combinational) circuit connected between QVCC and VSS, and a data storage (sequential) circuit, connected between VCC and VSS. The data storage circuit includes a low-threshold input section for receiving data from the logic circuit and a high-threshold latch section for latching the data received by the input section. Mode switching transistors are inserted between the low-threshold logic circuit and VSS, between low-threshold input section and VCC and between the low-threshold input section and VSS, for effecting a sleep mode of the semiconductor integrated circuit. Low power dissipation is maintained with a reduced circuit scale.
摘要:
Cyclopentanone 1,2-monooxygenase (CPMO) from Comamonas (previously Pseudomonas) sp. strain NCIMB 9872 carries out the second step of a degradation pathway that allows the bacterium to use cyclopentanol as a sole carbon source for growth. In the present invention there is reported the localization of the CPMO-encoding gene (cpnB) on a 4.3-kb SphI fragment, the determination of its sequence. The 550-amino acid CPMO polypeptide (Mt, 62,111) encoded by the gene was found to have 36.5% identity with the sequence of cyclohexanone 1,2-monooxygenase (CHMO) of Acinetobacter sp. strain NCIMB 9871. The 62-kDa CPMO was expressed in E. coli as an IPTG-inducible protein.
摘要:
An inverter circuit has first and second input terminals for receiving a complementary input signals, first and second output terminals for outputting a complementary output signals generated from the complementary input signals, and a pair of rectifier sections each for flowing the charge stored on a higher-potential side of the output terminals to a lower-potential said of the output terminals, for saving power dissipation.
摘要:
A square measure of a basic cell and a basic circuit cell of a semiconductor device used a SOI.cndot.CMOS technology is reduced. In the semiconductor device used a SOI.cndot.CMOS technology, the basic cells constituted by two pieces of PMOS and two pieces of NMOS are arranged in order of the PMOS, the PMOS, the NMOS and NMOS or NMOS, the NMOS, the PMOS and the PMOS in a row, and the diffused layer of a portion on which the PMOS and the NMOS adjoin are formed in a manner to adjoin directly. Moreover, the power source wiring and the grounding wiring are arranged around the basic cell in a manner to being held in common with the adjacent cells, and at least one of PMOS diffused layers is arranged so as to be able to be connected with a power source wiring through a contact directly and at least one of NMOS diffused layers is arranged so as to be able to be connected with a grounding wiring through a contact directly.