Photon reducing agents for fluorescence assays
First Claim
1. A method of reducing undesired light emission from a sample, comprising:
- contacting a sample in need of reducing undesired light with an aqueous solution that comprises at least one photon reducing agent, wherein said sample comprises a living cell, wherein said cell comprises at least one photon producing agent and wherein said at least one photon reducing agent is substantially membrane impermeant, anddetecting an optical signal from said at least one photon producing agent.
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Abstract
The present invention provides a method for reducing undesirable light emission from a sample using at least one photon producing agent and at least one photon reducing agent (e.g. dye-based photon reducing agents). The present invention further provides a method for reducing undesirable light emission from a sample (e.g., a biochemical or cellular sample) with at least one photon producing agent and at least one collisional quencher. The present invention also provides a method for reducing undesirable light emission from a sample (e.g., a biochemical or cellular sample) with at least one photon producing agent and at least one quencher, such as an electronic quencher. The present invention also provides a system and method of screening test chemicals in fluorescent assays using photon reducing agents. The present invention also provides compositions, pharmaceutical compositions, and kits for practicing these methods.
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Citations
20 Claims
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1. A method of reducing undesired light emission from a sample, comprising:
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contacting a sample in need of reducing undesired light with an aqueous solution that comprises at least one photon reducing agent, wherein said sample comprises a living cell, wherein said cell comprises at least one photon producing agent and wherein said at least one photon reducing agent is substantially membrane impermeant, and detecting an optical signal from said at least one photon producing agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A composition of matter, comprising:
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a) a living cell, wherein said cell comprises at least one photon producing agent, and b) an aqueous solution with at least one photon reducing agent, wherein said at least one photon reducing agent is substantially membrane impermeant and does not specifically bind to said cell. - View Dependent Claims (17, 18, 19)
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20. A method of identifying a chemical with a biological activity, comprising:
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a) contacting a sample with a test chemical, said sample comprising a target, b) contacting said sample with an aqueous solution that comprises at least one photon reducing agent, wherein said sample comprises a living cell, wherein said cell comprises at least one photon producing agent that directly or indirectly monitors the activity of said target and said at least one photon reducing agent is substantially membrane impermeant, and c) detecting an optical signal from said at least one photon producing agent, wherein said at least one photon reducing agent has an absorption spectra that overlaps with the absorption, emission or excitation spectrum of said at least one photon producing agent or wherein said at least one photon producing agent can exhibit fluorescence resonance energy transfer with said at least one photon reducing agent.
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Specification