Abstract: The present teaching generally discloses a method of measuring the concentration of an analyte in a solution. The method includes selecting a binding compound; selecting an analog to an analyte and conjugating the analog to a polynucleotide substrate to construct a reagent for measuring the amount of the analyte in an assay solution using a desired polynucleotide reaction that comprises a polymerization reaction, a cleavage reaction, or a recombination reaction. The binding of the reagent to the binding compound in the assay solution competes with the binding of the analyte to the binding compound in the assay solution. The method also includes selecting a desired enzyme for catalyzing the desired polynucleotide reaction. Reagents and kits are also provided.

Abstract: The present teaching generally discloses a method of measuring the concentration of an analyte in a solution. The method includes selecting a binding compound; selecting an analog to an analyte and conjugating the analog to a polynucleotide substrate to construct a reagent for measuring the amount of the analyte in an assay solution using a desired polynucleotide reaction that comprises a polymerization reaction, a cleavage reaction, or a recombination reaction. The binding of the reagent to the binding compound in the assay solution competes with the binding of the analyte to the binding compound in the assay solution. The method also includes selecting a desired enzyme for catalyzing the desired polynucleotide reaction. Reagents and kits are also provided.

Abstract: A method for cloning a nucleic acid fragment into a vector by flanking the fragment with first and second adapter sequences, and contacting the fragment with the vector having sequences homologous to the first and second adapter sequences under conditions such that the nucleic acid fragment is incorporated into the vector by homologous recombination in vivo in a host cell. Additionally, a method for selecting for a successful transformation of a vector by a nucleic acid insert. Also, systems for cloning a nucleic acid fragment into a vector without at least one of a restriction enzyme, a ligase, a gyrase, a single stranded DNA binding protein, or other DNA modifying enzymes. Further, a kit for cloning a nucleic acid fragment into a vector.

Abstract: A method for cloning a nucleic acid fragment into a vector by flanking the fragment with first and second adapter sequences, and contacting the fragment with the vector having sequences homologous to the first and second adapter sequences under conditions such that the nucleic acid fragment is incorporated into the vector by homologous recombination in vivo in a host cell. Additionally, a method for selecting for a successful transformation of a vector by a nucleic acid insert. Also, systems for cloning a nucleic acid fragment into a vector without at least one of a restriction enzyme, a ligase, a gyrase, a single stranded DNA binding protein, or other DNA modifying enzymes. Further, a kit for cloning a nucleic acid fragment into a vector.

Abstract: A method for cloning a nucleic acid fragment into a vector by flanking the fragment with first and second adapter sequences, and contacting the fragment with the vector having sequences homologous to the first and second adapter sequences under conditions such that the nucleic acid fragment is incorporated into the vector by homologous recombination in vivo in a host cell. Additionally, a method for selecting for a successful transformation of a vector by a nucleic acid insert. Also, systems for cloning a nucleic acid fragment into a vector without at least one of a restriction enzyme, a ligase, a gyrase, a single stranded DNA binding protein, or other DNA modifying enzymes. Further, a kit for cloning a nucleic acid fragment into a vector.

Abstract: A method for cloning a nucleic acid fragment into a vector by flanking the fragment with first and second adapter sequences, and contacting the fragment with the vector having sequences homologous to the first and second adapter sequences under conditions such that the nucleic acid fragment is incorporated into the vector by homologous recombination in vivo in a host cell. Additionally, a method for selecting for a successful transformation of a vector by a nucleic acid insert. Also, systems for cloning a nucleic acid fragment into a vector without restriction enzyme, ligase, gyrase, single stranded DNA binding protein, or other DNA modifying enzymes. Further, a kit for cloning a nucleic acid fragment into a vector.

Abstract: A method and system for controlling the expression of transgene products in specific tissues in a transgenic animal is provided. The method comprises: a) providing a fist transgenic parent animal whose genome comprises an F transgene comprising an exogenous gene operatively linked to a promoter that is upregulated by a transactivator protein; b) providing a second transgenic parent animal whose genome comprises i) a second transgene, comprising a second promoter that is downregulated by the transactivator protein and operatively linked to an antisense gene that encodes a sequence which inhibits or reduces processing of the F transgene transcript; and ii) a third transgene comprising a tissue specific promoter operatively linked to a gene encoding the transactivator protein; and c) breeding the first transgenic parent animal with the second transgenic parent animal to provide a transgenic offspring animal whose genome comprises the three transgenes.