The disclosure provides methods and compositions useful for labeling of target molecules with origin-specific nucleic acid identifiers (for example, barcodes), which can be used subsequently to identify, quantify, or otherwise characterize a feature or activity of target molecules originating from a particular discreet volume. Such target molecules can include polypeptides expressed by cells, in which nucleic acid molecules encoding the polypeptides are labeled with the same, or matched, origin-specific nucleic acid identifiers.

The present invention provides methods for quantifying and/or screening for the formation of complexes, in which two of the three compounds of the complex are proteins, one of the two tagged with a fluorescent label and the other of the two tagged with a fluorescence quencher. The third compound is a compound capable of linking those two proteins together, thus forming a ternary complex. The methods of the present invention consist of analysing the changes in fluorescence spectrum that occur following the formation of a complex comprising said compounds, due to the interaction between fluorescent label and fluorescence quencher that formation of said complex brings.

Provided herein are, inter alia, methods of identifying agents that are capable inhibiting the binding (e.g., coupling) between a ROR1 protein and a ROR2 protein. By interfering with ROR1-ROR2 coupling (binding) the agents identified using the methods provided herein inhibit non-canonical Wnt5a signaling. Thus, the agents identified by the methods provided herein may, inter alia, be useful for cancer diagnosis and therapy.

A method for analyzing a component using a fluidic device. The method includes the steps of providing a distribution of the component across contacting first and second fluid flows; diverting a part of the first fluid flow, a part of the second fluid flow, or parts of the first fluid flow and the second fluid flow, wherein the diverted part includes the component; and analyzing the component in the diverted part of the fluid flow. Optionally the component may be labelled prior to the analyzing step. A flow apparatus for use in the method is also provided.

A method and apparatus for the physico-chemical encoding of a collection of beaded resin (beads) to determine the chemical identity of bead-anchored compounds by in-situ interrogation of individual beads. The present invention provides method and apparatus to implement color-coding strategies in applications and including the ultrahigh-throughput screening of bead-based combinatorial compounds libraries as well as multiplexed diagnostic and environmental testing and other biochemical assays.

The present disclosure provides immunoassays using one or more over-labeled fluorescent probes, which provides for rapid, accurate and quantitative detection of one or more target analytes in sample, reading fluorescent intensity. The disclosed immunoassays provide multiplexing capability with low cross-reactivity.

Provided is a linker for both screening assessment of the candidate clones without using enzymes, and to provide an in vitro selection method using thereof. Also, provided is a high-speed photo-crosslinking linker for molecular interaction analysis and in vitro selection comprising a backbone and a side chain. The backbone comprises a solid-phase binding site located at the 5 terminus for forming a bond with a solid-phase; a solid-phase cleavage site for releasing the entire solid-phase at the site; a side chain linking site for linking a side chain; a high-speed photo-crosslinking site for linking the backbone to mRNA having a sequence complementary thereof via photo-cros slinking; and a reverse transcription initiation region located adjacent to the side chain linking site at the 3 terminus of the backbone. The side chain comprises a fluorescent label, a protein binding site located at the free terminus thereof; and a binding site with the backbone.

The present invention provides unstructured recombinant polymers (URPs) and proteins containing one or more of the URPs. The present invention also provides microproteins, toxins and other related proteinaceous entities, as well as genetic packages displaying these entities. The present invention also provides recombinant polypeptides including vectors encoding the subject proteinaceous entities, as well as host cells comprising the vectors. The subject compositions have a variety of utilities including a range of pharmaceutical applications.

Methods and compositions for multiplexed protein-protein interaction profiling (e.g., immunoprofiling), based on nucleic acid tagging of polypeptides (e.g., by RNA display) are described. In some embodiments the described compositions and methods utilize a library of prey polypeptide targets linked to prey RNAs encoding them, and a population of bait polypeptides, e.g., a mixture of antibodies, that bind to one or more of the prey polypeptide targets and are used to isolate and identify the bound prey polypeptide targets by amplification of their associated prey RNAs and sequencing of the corresponding cDNAs. In other embodiments the prey polypeptide targets are linked to DNA Bar Codes, which serve as unique identifiers of the tagged polypeptide.

The present application relates to the identification of the role of naked cuticle homolog 2 (Nkd2) gene-derived protein in the development of chronic kidney disease, in particular of progressive chronic kidney disease and kidney fibrosis. The present invention particularly relates to methods for identifying compounds that bind to Nkd2 protein, and to the use of Nkd2 for screening and identifying Nkd2-interacting compounds. The invention further relates to pharmaceutical compositions for use in the treatment of kidney diseases, in particular to pharmaceutical compositions comprising agents binding to and/or inhibiting NKD2 protein.