Provided herein are high-pressure liquid chromatography (HPLC) methods for detecting multi-specific molecule formation after a multi-specific molecule manufacturing or development process. The HPLC methods provide fast, quantitative, real-time processing of multi-specific molecule formation.

Provided herein, inter alia, are engineered antibodies or antigen-binding fragments thereof that exhibit one or more improved properties relating to manufacturability, thermostability, and/or protease resistance as well as methods for making and using the same.

Methods are disclosed of designing antibodies for a sandwich assay for a small molecule having a molecular weight of about 500 to about 2,000. The method comprises preparing a first antibody that binds to the small molecule, and preparing a second antibody that binds to the small molecule at a portion of the small molecule other than a portion to which the first antibody binds. The second antibody is prepared from an immunogen that comprises a predetermined portion of the small molecule. The antibodies may be employed in sandwich assays for the small molecule.

Provided are a human genome-derived polynucleotide having a chromatic regulator factor function, a recombinant vector and a recombinant cell, each comprising same, and a method for producing a polypeptide of interest using same.

Provided herein are methods and compositions relating to libraries of optimized antibodies having nucleic acids encoding for an antibody comprising modified sequences. Libraries described herein comprise nucleic acids encoding SARS-CoV-2 or ACE2 antibodies. Further described herein are protein libraries generated when the nucleic acid libraries are translated. Further described herein are cell libraries expressing variegated nucleic acid libraries described herein.

Provided herein are methods and compositions relating to libraries of optimized antibodies having nucleic acids encoding for an antibody comprising modified sequences. Libraries described herein comprise nucleic acids encoding SARS-CoV-2 or ACE2 antibodies. Further described herein are protein libraries generated when the nucleic acid libraries are translated. Further described herein are cell libraries expressing variegated nucleic acid libraries described herein.

Disclosed herein are methods for high-throughput screening of a functional antibody fragment for an immunoconjugate that targets a protein antigen. The method combines a phage-displayed synthetic antibody library and high-throughput cytotoxicity screening of non-covalently assembled immunotoxins or cytotoxic drug to identify highly functional synthetic antibody fragments for delivering toxin payloads.

Provided herein are methods and compositions related to non-human animals that express exogenous Terminal Deoxynucleotidyltransferase (TdT).

Described herein are methods of reducing Salmonella in the intestines of poultry in need thereof by administering to a poultry bird an effective amount of an interleukin-10 peptide or an isolated antibody that specifically binds an interleukin-10 peptide. Administering may be performed within 1 to 4 weeks of harvest of the poultry in order to reduce Salmonella transmission to human consumers. Also included herein are finishing feeds that include an interleukin-10 peptide or an isolated antibody that specifically binds an interleukin-10 peptide.

The invention provides IGFBP7 immunoassays with improved clinical performance, particularly when used in the evaluation of renal injuries. The immunoassays rely on the selection and use of antibodies and antibody pairs that exhibit improved assay performance when used in complex clinical specimens such as biological fluids, and particularly when used in rapid assay formats such as lateral flow test devices.