Abstract:
In the present invention, a detector responsive to an interference pattern produces pulses which relate to the fringe change of the pattern. The pulses are timed by a running clock. The pulse times are fed to an interpolating means such as a computer for interpolating fringe change between the last pulse and a measurement command signal. The detector of the present invention is specifically applicable to ring laser angular rate sensor systems.
Abstract:
The invention relates to transgenic non-human animals capable of producing heterologous antibodies and methods for producing human sequence antibodies which bind to human antigens with substantial affinity.
Abstract:
The invention relates to transgenic non-human animals capable of producing heterologous antibodies and methods for producing human sequence antibodies which bind to human antigens with substantial affinity.
Abstract:
The present invention provides methods and compositions for transferring large transgene polynucleotides and unlinked selectable marker polynucleotides into eukaryotic cells by a novel method designated co-lipofection. The methods and compositions of the invention are used to produce novel transgenic non-human animals harboring large transgenes, such as a transgene comprising a human APP gene or human immunoglobulin gene.
Abstract:
Method and apparatus for reducing the effects of lock-in in a ring laser gyroscope. A sinusoidal noise signal is generated having a peak amplitude which shifts as a function of a dither drive monitor signal to new, random, peak amplitude levels. In the preferred embodiment, the peak amplitude level changes at each zero crossing of the dither drive monitor signal. Each new peak amplitude level is determined as a function of a value provided by a passband filtered random or pseudo random noise source. A step noise signal representative of that passband filtered value is multiplied by the dither drive monitor signal and the resulting sinusoidal noise signal is summed into the dither drive monitor signal. The resulting signal is then used to introduce a frequency bias, electrically or mechanically in at least one of the RLG light beams.
Abstract:
A transgenic chicken is disclosed having disrupted endogenous immunoglobulin production. In one embodiment, a targeting construct is stably integrated into the genome of the chicken by homologous recombination in embryonic stem cells, and injection of the engineered embryonic stem cells into recipient embryos, thereby knocking out the endogenous immunoglobulin gene locus in resulting animals. The targeted disruption of the locus in embryonic stem cells is particularly useful in combination with the insertion of genetic elements encoding exogenous immunoglobulin molecules. After these chickens are cross-bred, a line of chickens is produced that has a reduction of endogenous immunoglobulin molecule production.
Abstract:
The invention relates to transgenic non-human animals capable of producing heterologous antibodies and transgenic non-human animals having inactivated endogenous immunoglobulin genes. In one aspect of the invention, endogenous immunoglobulin genes are suppressed by antisense polynucleotides and/or by antiserum directed against endogenous immunoglobulins. Heterologous antibodies are encoded by immunoglobulin genes not normally found in the genome of that species of non-human animal. In one aspect of the invention, one or more transgenes containing sequences of unrearranged heterologous human immunoglobulin heavy chains are introduced into a non-human animal thereby forming a transgenic animal capable of functionally rearranging transgenic immunoglobulin sequences and producing a repertoire of antibodies of various isotypes encoded by human immunoglobulin genes. Such heterologous human antibodies are produced in B-cells which are thereafter immortalized, e.g., by fusing with an immortalizing cell line such as a myeloma or by manipulating such B-cells by other techniques to perpetuate a cell line capable of producing a monoclonal heterologous antibody. The invention also relates to heavy and light chain immunoglobulin transgenes for making such transgenic non-human animals as well as methods and vectors for disrupting endogenous immunoglobulin loci in the transgenic animal.
Abstract:
The invention relates to transgenic non-human animals capable of producing heterologous antibodies of multiple isotypes. Heterologous antibodies are encoded by immunoglobulin heavy chain genes not normally found in the genome of that species of non-human animal. In one aspect of the invention, one or more transgenes containing sequences that permit isotype switching of encoded unrearranged heterologous human immunoglobulin heavy chains are introduced into a non-human animal thereby forming a transgenic animal capable of producing antibodies of various isotypes encoded by human immunoglobulin genes. Such heterologous human antibodies are produced in B-cells which are thereafter immortalized, e.g., by fusing with an immortalizing cell line such as a myeloma or by manipulating such B-cells by other techniques to perpetuate a cell line capable of producing a monoclonal heterologous antibody. The invention also relates to heavy and light chain immunoglobulin transgenes for making such transgenic non-human animals as well as methods and vectors for disrupting endogenous immunoglobulin loci in the transgenic animal.
Abstract:
A power supply circuit is disclosed for a ring laser having a cathode and having first and second anodes so that the ionization current between the cathode and each of the anodes are substantially equal. According to the invention, a Zener diode is electrically connected in the path of one of the ionization currents. The Zener voltage magnitude of the Zener diode is selected so as to equalize the ionization currents.
Abstract:
The invention relates to transgenic non-human animals capable of producing heterologous antibodies and methods for producing human sequence antibodies which bind to human antigens with substantial affinity.