Provided are dyes and compositions which are useful in a number of applications, such as the detection and monitoring protein aggregation, kinetic studies of protein aggregation, neurofibrillary plaques analysis, evaluation of protein formulation stability, and analysis of molecular chaperone activity.

According to the present teachings, compositions, kits, and methods for protein melt analysis are provided that utilizing one or more fluorophore dyes. In some embodiments, a method comprises preparing a sample by mixing at least one protein with two or more dyes, and applying a controlled heating, while recording the fluorescence emission of the sample. The methods can be used, for example, for screening conditions for optimized protein stability, screening for ligands that bind and enhance protein stability (e.g., protein-protein interactions), screening for mutations for enhanced stability, screening crystallization conditions for protein stability, screening storage conditions for protein stability, and screening conditions in which a protein will be used (e.g., production conditions, treatment conditions, etc.) for protein stability.

The present invention discloses the spiropyran compound of formula (I), process for preparation thereof and a composition comprising spiropyran compound of formula (I) on a support, wherein said support selected from polymers such as Poly (ethylene oxide), Polydimethylsiloxane (PDMS), Ethylene propylene diene monomer (EPDM).

The present invention relates to a method of visualizing biomolecules, having the steps of: a) providing a sample of immobilized biomolecules in a matrix and carry on the electrophoresis process; b) incubating the matrix of step a) in a solution containing a cyanine-derived molecule, for a time of 5 to 60 minutes, at room temperature, in a container preventing exposure to light, shaking the container at less of 75 rpm; c) transferring the matrix from step b) to a container with a solution having: at least one tetrazolium salt and incubating for a time of 15 to 120 minutes at room temperature under light exposure; d) removing the matrix with immobilized biomolecules from the previous step and washing with distilled water; and e) visualizing directly by the naked eye the biomolecules immobilized in the matrix.

Voltage sensitive dyes comprising boron and related compositions and methods are provided. In some embodiments, a voltage sensitive dye comprises an electron acceptor comprising boron. The electron acceptor may be attached (e.g., covalently) to at least one electron donating group and at least one polar group. For instance, the electron acceptor may comprise optionally substituted boron dipyrromethene (e.g., optionally substituted 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene). The point of attachment and chemical nature of the electron donating group(s) and polar group(s) may be selected to impart beneficial properties to the voltage sensitive dye. For instance, the voltage sensitive dye may have an extended difference in the dipole moment between the ground and electronic states due at least in part to the position of the electron donating group(s). The voltage sensitive dyes, described herein, may have high specificity, high signal to noise ratio, fast responsivity, high voltage sensitivity, high photostability, and/or high brightness.

The present disclosure embodies compounds, methods, and kits that are useful in connection with the detection of analytes of all types (e.g., biological molecules such as proteins, organic molecules, natural or synthetic molecules). The disclosure is particularly applicable to detection of proteins and nucleic acids using all types of membrane-based assays by techniques such as Western blotting, Dot blotting, Southern blotting, and Northern blotting.

A photoelectric conversion element includes a conductive support, a photoconductor layer including an electrolyte, a charge transfer layer including an electrolyte, and a counter electrode, in which the photoconductor layer has semiconductor fine particles carrying a metal complex dye represented by a specific formula.

Disclosed herein are reversibly-switchable surfactants and methods of extracting natural products, coating surfaces, cleaning laundry, and osmotic extraction using same.

A dye solution for a photoelectric conversion element contains at least one metal complex dye represented by a specific formula and a solvent including at least one alcohol solvent having a specific structure.

According to the present teachings, compositions, kits, and methods for protein melt analysis are provided that utilizing one or more fluorophore dyes. In some embodiments, a method comprises preparing a sample by mixing at least one protein with two or more dyes, and applying a controlled heating, while recording the fluorescence emission of the sample. The methods can be used, for example, for screening conditions for optimized protein stability, screening for ligands that bind and enhance protein stability (e.g., protein-protein interactions), screening for mutations for enhanced stability, screening crystallization conditions for protein stability, screening storage conditions for protein stability, and screening conditions in which a protein will be used (e.g., production conditions, treatment conditions, etc.) for protein stability.