Abstract: The present disclosure provides a method for chemoselective modification of a target molecule. A subject method includes contacting a target molecule comprising a thiol moiety with a biomolecule comprising a reactive moiety, wherein the reactive moiety is generated by reaction of a biomolecule comprising a phenol moiety or a catechol with an enzyme capable of oxidizing the phenol or the catechol moiety. The contacting is carried out under conditions sufficient for conjugation of the target molecule to the biomolecule, thereby producing a modified target molecule. The present disclosure provides compositions comprising a subject target molecule comprising a thiol moiety, and a biomolecule comprising a phenol moiety or a catechol moiety. The present disclosure provides kits for carrying out a subject method. The present disclosure also provides modified target molecules and methods for using same.

Abstract: An amphiphilic fusion protein has a formula S/I—X—H1—H2, wherein S— is a solubilizing moiety, I— is an insolubilizing moiety, —X— is a peptide sequence comprising a proteolytic or chemical cleavage site, —H1— is a hydrophilic peptide, and —H2 is a hydrophobic peptide.

Abstract: Methods for preparing a protein conjugate having a defined number of conjugate groups are provided. The method includes: forming a mixture containing a macrocyclic matrix material and a plurality of proteins; eluting the proteins to obtain a first separated protein fraction and a second separated protein fraction, wherein substantially all of the proteins in the first separated protein fraction have the same number of handle moieties; contacting the handle moieties with a conversion reagent under conditions sufficient to convert the handle moieties in the first separated protein fraction to reactive moieties; and contacting the reactive moieties with a conjugation reagent under conditions sufficient to form a plurality of protein conjugates, wherein substantially all of the protein conjugates in the plurality have the same number of conjugate groups. Methods also include recovering enzymes and other proteins from mixtures for isolation and/or reuse of the enzymes and proteins.

Abstract: Methods for preparing a protein conjugate having a defined number of conjugate groups are provided. The method includes: forming a mixture containing a macrocyclic matrix material and a plurality of proteins; eluting the proteins to obtain a first separated protein fraction and a second separated protein fraction, wherein substantially all of the proteins in the first separated protein fraction have the same number of handle moieties; contacting the handle moieties with a conversion reagent under conditions sufficient to convert the handle moieties in the first separated protein fraction to reactive moieties; and contacting the reactive moieties with a conjugation reagent under conditions sufficient to form a plurality of protein conjugates, wherein substantially all of the protein conjugates in the plurality have the same number of conjugate groups. Methods also include recovering enzymes and other proteins from mixtures for isolation and/or reuse of the enzymes and proteins.

Abstract: A sulfonamide based rare earth element ion separation media and method of synthesis and use are provided. A bed or column of sulfonamide resin for separations can be prepared by exposing a sulfonate resin to chlorosulfonic acid to form a sulfonyl chloride resin; exposing the sulfonyl chloride resin to aqueous ammonia to form a sulfonamide resin; and then packing the sulfonamide resin into a separation column. Mixtures of lanthanide and other rare earth ions with very similar atomic radii and characteristics can be separated by flowing a mixture of lanthanide ions through a bed of sulfonamide resin followed by a mobile phase of an organic acid such as lactic acid to elute the separated rare earth element ions separated by the sulfonamide resin. Collected fractions of eluate can also be recycled through the sulfonamide media.

Abstract: The present invention provides conjugates of DNA and cells by linking the DNA to a native functional group on the cell surface. The cells can be without cell walls or can have cell walls. The modified cells can be linked to a substrate surface and used in assay or bioreactors.

Abstract: Provided herein are methods for enhancing enzymatic activity using certain polymers that may be optionally attached to an enzyme. The polymers may be thermally-responsive polymers, including poly N-isopropylacrylamide or poly N-isopropylmethacrylamide. The polymer may also be a copolymer with at least two different monomer residues. The monomer residues may have a structure of formula (I): wherein R1, RA and RB are as described herein. Examples of such monomer residues may include N-isopropylacrylamide (NIPAm) or N-isopropylmethacrylamide (NIPMa). The polymer may include additional monomer residues, such as aminooxy-bearing methacrylamide monomer residues that can be modified to vary the lower critical solution temperature (LCST) of the polymer.

Abstract: The present disclosure provides modified Fc domains having one or more attachment moieties for attaching a heterologous functional moiety; and methods of generating the modified Fc domains. The present disclosure provides Fc conjugates; and methods of making the conjugates. The Fc conjugates are useful in various methods, which are also provided.

Abstract: The present invention provides conjugates of DNA and cells by linking the DNA to a native functional group on the cell surface. The cells can be without cell walls or can have cell walls. The modified cells can be linked to a substrate surface and used in assay or bioreactors.

Abstract: The present invention provides conjugates of DNA and cells by linking the DNA to a native functional group on the cell surface. The cells can be without cell walls or can have cell walls. The modified cells can be linked to a substrate surface and used in assay or bioreactors.

Abstract: A sulfonamide based rare earth element ion separation media and method of synthesis and use are provided. A bed or column of sulfonamide resin for separations can be prepared by exposing a sulfonate resin to chlorosulfonic acid to form a sulfonyl chloride resin; exposing the sulfonyl chloride resin to aqueous ammonia to form a sulfonamide resin; and then packing the sulfonamide resin into a separation column. Mixtures of lanthanide and other rare earth ions with very similar atomic radii and characteristics can be separated by flowing a mixture of lanthanide ions through a bed of sulfonamide resin followed by a mobile phase of an organic acid such as lactic acid to elute the separated rare earth element ions separated by the sulfonamide resin. Collected fractions of eluate can also be recycled through the sulfonamide media.

Abstract: The disclosure relates to methods of photopatterning molecules directly on a surface by photochemical means.

Abstract: Provided herein are methods for enhancing enzymatic activity using certain polymers that may be optionally attached to an enzyme. The polymers may be thermally-responsive polymers, including poly N-isopropylacrylamide or poly N-isopropylmethacrylamide. The polymer may also be a copolymer with at least two different monomer residues. The monomer residues may have a structure of formula (I): wherein R1, RA and RB are as described herein. Examples of such monomer residues may include N-isopropylacrylamide (NIPAm) or N-isopropylmethacrylamide (NIPMa). The polymer may include additional monomer residues, such as aminooxy-bearing methacrylamide monomer residues that can be modified to vary the lower critical solution temperature (LCST) of the polymer.

Abstract: The present disclosure provides modified Fc domains having one or more attachment moieties for attaching a heterologous functional moiety; and methods of generating the modified Fc domains. The present disclosure provides Fc conjugates; and methods of making the conjugates. The Fc conjugates are useful in various methods, which are also provided.

Abstract: The present invention provides conjugates of DNA and cells by linking the DNA to a native functional group on the cell surface. The cells can be without cell walls or can have cell walls. The modified cells can be linked to a substrate surface and used in assay or bioreactors.

Abstract: The present invention provides a novel means of delivering imaging agents and/or therapeutic agents to specific cellular sites in an animal involving the use of a viral capsid that is chemically modified on it exterior and/or interior surfaces.

Abstract: The present invention provides methods and compositions, i.e. synthetic libraries of binding moities, for identifying compounds which bind to a metal atom or to non-metal ions, e.g., cationic or anionic molecules.