Abstract: The present invention provides methods and compositions for converting a first polypeptide into a chimeric polypeptide. The invention includes two vectors: a first vector including the sequence of the first polypeptide and a second vector including a second polypeptide. The vectors include complementary site-specific recombination motifs such that site-specific recombination between the two vectors results in the generation of a chimeric polypeptide including at least a portion of the first polypeptide and at least a portion of the second polypeptide. A site-specific recombination motif may be positioned within an intron or within a coding sequence on the first or second vector.

Abstract: The identification of binding moieties capable of selectively interacting with one or more target antigens is of scientific, medical, and commercial value. Disclosed herein are methods and compositions for the identification, labeling and/or retrieval of cognate binding moieties.

Abstract: Disclosed herein is an efficient method of generating a library of variants of a sequence of interest, such as may be used in directed evolution, in one embodiment, the method includes an amplification reaction, e.g. error-prone PCR, to generate double-stranded DNA (dsDNA) variants of a sequence of interest, after which one strand of the dsDNA variants may be selectively degraded to produce single-stranded DNA (ssDNA) variants. The ssDNA variants may be hybridized to ssDNA intermediaries, e.g., uracilated circular ssDNA intermediaries, to form heteroduplex DNA, which may be transformed into cells, such as E. coli cells, yielding a library of variants. This method eliminates the inefficient sub-cloning steps and the need for costly primer sets required by many prior methods.

Abstract: Disclosed herein is an efficient method of generating a library of variants of a sequence of interest, such as may be used in directed evolution, in one embodiment, the method includes an amplification reaction, e.g. error-prone PCR, to generate double-stranded DNA (dsDNA) variants of a sequence of interest, after which one strand of the dsDNA variants may be selectively degraded to produce single-stranded DNA (ssDNA) variants. The ssDNA variants may be hybridized to ssDNA intermediaries, e.g., uracilated circular ssDNA intermediaries, to form heteroduplex DNA, which may be transformed into cells, such as E. coli cells, yielding a library of variants. This method eliminates the inefficient sub-cloning steps and the need for costly primer sets required by many prior methods.

Abstract: The identification of binding moieties capable of selectively interacting with one or more target antigens is of scientific, medical, and commercial value. Disclosed herein are methods and compositions for the identification, labeling, and/or retrieval of cognate binding moieties.

Abstract: Disclosed are methods of identifying binding moieties that recognize antigens displayed on cells, such as membrane proteins or recombinant proteins that display eptiopes on the surface of cells. Binding moieties capable of binding membrane proteins can be difficult to obtain because these proteins can depend on their native environments for structural integrity. In some methods scFv phage display libraries are panned against whole cells expressing a membrane protein in an emulsion. Certain methods further permit discrimination of binding moieties according to their affinity or avidity for a target. This approach allows rapid identification of cell surface epitope specific antibodies for research, diagnostics, and immunotherapeutics.

Abstract: The present invention provides methods and compositions for converting a first polypeptide into a chimeric polypeptide. The invention includes two vectors: a first vector including the sequence of the first polypeptide and a second vector including a second polypeptide. The vectors include complementary site-specific recombination motifs such that site-specific recombination between the two vectors results in the generation of a chimeric polypeptide including at least a portion of the first polypeptide and at least a portion of the second polypeptide. A site-specific recombination motif may be positioned within an intron or within a coding sequence on the first or second vector.

Abstract: Disclosed herein is an efficient method of generating a library of variants of a sequence of interest, such as may be used in directed evolution. In one embodiment, the method includes an amplification reaction, e.g., error-prone PCR, to generate double-stranded DNA (dsDNA) variants of a sequence of interest, after which one strand of the dsDNA variants may be selectively degraded to produce single-stranded DNA (ssDNA) variants. The ssDNA variants may be hybridized to ssDNA intermediaries, e.g., uracilated circular ssDNA intermediaries, to form heteroduplex DNA, which may be transformed into cells, such as E. coli cells, yielding a library of variants. This method eliminates the inefficient sub-cloning steps and the need for costly primer sets required by many prior methods.

Abstract: The identification of binding moieties capable of selectively interacting with one or more target antigens is of scientific, medical, and commercial value. Disclosed herein are methods and compositions for the identification, labeling, and/or retrieval of cognate binding moieties.

Abstract: Disclosed herein is an efficient method of generating a library of variants of a sequence of interest, such as may be used in directed evolution, in one embodiment, the method includes an amplification reaction, e.g. error-prone PCR, to generate double-stranded DNA (dsDNA) variants of a sequence of interest, after which one strand of the dsDNA variants may be selectively degraded to produce single-stranded DNA (ssDNA) variants. The ssDNA variants may be hybridized to ssDNA intermediaries, e.g., uracilated circular ssDNA intermediaries, to form heteroduplex DNA, which may be transformed into cells, such as E. coli cells, yielding a library of variants. This method eliminates the inefficient sub-cloning steps and the need for costly primer sets required by many prior methods.