Amphoteric Fluorescent Substance for Low Non-Specific Biomolecule Binding
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Solution Overview
Problem
Conventional fluorescent dyes exhibit non-specific binding with electrically charged biomolecules, leading to false positive reactions and reduced reliability in protein-specific peptide technology and biochip analysis.
Innovation Solution
Development of an amphoteric fluorescent substance with amphoteric ability, minimizing non-specific binding by incorporating an amphoteric ion moiety that balances cations and anions, using compounds represented by Structural Formula 1.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional fluorescent dye with electrical charge is used, then binding with biomolecules occurs, but non-specific binding increases causing false positive reactions
Solution Approach 1:
The patent changes the electrical charge parameter of the fluorescent dye from permanently charged (conventional) to amphoteric (capable of both positive and negative charges). This parameter change allows the dye to adapt its charge state based on the local environment, minimizing non-specific binding while maintaining specific binding capability, thereby resolving the contradiction between detection accuracy and non-specific binding
Solution Approach 2:
The fluorescent dye in the patent incorporates both cationic and anionic functional groups within the same molecular structure, creating a composite material with amphoteric properties. This composite structure enables the dye to interact selectively with biomolecules through specific charge interactions while reducing non-specific binding, thus improving reliability without increasing harmful non-specific interactions
2Object-generated harmful factors
If a perfectly neutral fluorescent dye is used, then non-specific binding with charged biomolecules decreases, but false positive reactions occur due to hydrophobicity
Solution Approach 1:
Instead of using a perfectly neutral dye, the patent employs an amphoteric dye whose charge state can dynamically change. This allows the dye to present appropriate charge characteristics (positive or negative) depending on the pH and local environment, preventing both non-specific binding and false positive reactions by avoiding the hydrophobicity problem of neutral dyes while maintaining charge-based selectivity
3Object-generated harmful factors
If buffer solution or neutral surfactant is used to minimize non-specific binding, then non-specific reactivity decreases, but precision of analysis in biosensors and surgical operations is compromised
Solution Approach 1:
The amphoteric fluorescent dye acts as an intermediary that inherently minimizes non-specific reactivity through its charge properties, eliminating the need for buffer solutions or neutral surfactants. This direct approach maintains analysis precision in biosensors and surgical operations while still reducing non-specific binding, as the dye's amphoteric nature provides built-in selectivity without requiring additional chemical mediators
Data Source
AI summary
The present invention provides an amphoteric fluorescent substance capable of being attached to biomaterials.