Dual-Mode Separation Composition for Biomolecule Cleanup
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Solution Overview
Problem
Existing methods for removing small molecules such as unreacted labels and chemical agents from larger biomolecules are time-consuming and inefficient, leading to issues during downstream analysis and processing.
Innovation Solution
Compositions and systems utilizing size exclusion supports combined with specific moieties that associate with small molecules, allowing for rapid separation and removal of these contaminants from larger biomolecules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If dialysis is used to remove unreacted dyes, biotin and reducing agents from proteins, then small molecules are removed from the sample, but the process takes twelve to fourteen hours
Solution Approach 1:
The patent combines size exclusion chromatography and ion exchange chromatography into a single dual-mode resin system. The size exclusion component provides rapid physical separation of small molecules from proteins, while the ion exchange component simultaneously captures small molecules through electrostatic interactions. This merged approach achieves complete small molecule removal in minutes rather than hours.
Solution Approach 2:
The dual-mode resin performs multiple functions simultaneously: it acts as both a size exclusion medium and an ion exchange medium. This multi-functionality allows the single resin to remove various types of small molecules (dyes, biotin, reducing agents) through both size-based and charge-based mechanisms, eliminating the need for sequential dialysis and chromatography steps.
2Quantity of substance
If size exclusion chromatography is used to remove small molecules, then small molecules are separated from biomolecules, but the procedure requires complex and expensive chromatography instrumentation and takes thirty minutes to several hours
Solution Approach 1:
The patent merges size exclusion and ion exchange mechanisms into a single resin bead structure. This integration eliminates the need for complex, expensive chromatography systems by providing both separation mechanisms in one simple column or tube that can be operated with basic laboratory equipment.
Solution Approach 2:
The dual-mode resin is a composite material that incorporates both size exclusion properties (porous structure) and ion exchange properties (charged functional groups) within the same resin bead. This composite structure enables simultaneous operation of both mechanisms, simplifying the overall separation system while maintaining high effectiveness.
3Quantity of substance
If ion exchange resins are used for separating small molecules, then small molecules are removed through ion-exchanger interaction, but protein recovery is poor because proteins have to be eluted out of the ion-exchanger requiring multiple steps
Solution Approach 1:
The patent segments the separation mechanism into two distinct components operating simultaneously: size exclusion (which allows proteins to pass through quickly) and ion exchange (which captures small molecules). This segmentation ensures that proteins are not retained by the resin and can be recovered in a single step, while small molecules are effectively removed.
Solution Approach 2:
The dual-mode resin has different functional regions: the porous structure provides size exclusion properties that allow rapid protein passage, while the charged functional groups provide ion exchange properties that selectively bind small molecules. This local differentiation of properties enables simultaneous protein recovery and small molecule removal without interfering with each other.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method significantly reduces the quantity of small molecules in a single step, enhancing the purity of biomolecules for downstream processing and reducing time and costs.
Implementation Method 1
size exclusion supports combined with specific moieties that associate with small molecules, allowing for rapid separation and removal of these contaminants from larger biomolecules
Implementation Method 2
at least one moiety that can associate with the one or more small molecules, thereby separating the small molecules from the other components present in the sample
Data Source
AI summary
The present specification relates to compositions, devices, apparatus, methods, kits and systems for sample preparation (e.g., separation, reduction or removal of small molecules from biomolecules in a sample). Exemplary small molecules that can be separated, reduced or removed have a molecular weight range of <2000 Da. and may include, but are not limited to, dyes, biotin, affinity tags, crosslinkers, reducing agents, labels, nanoparticles, radioactive ligands, mass tags, unreacted molecules and combinations, intermediates and derivatives of the foregoing. Exemplary biomolecules present in a sample, include but are not limited to, proteins, glycoproteins, antibodies, peptides, nucleic acids, polysaccharides, carbohydrates and lipids. Methods, compositions, kits, devices, apparatus and systems of the disclosure may advantageously provide superior separation of small molecule contaminants and additionally reduce time and expenses related to separation of small molecules from larger biomolecules in samples. Biomolecules separated as set forth herein are amenable to better downstream processing.