Sequencing Kit Hydrogel Matrix Spatial Segregation
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Solution Overview
Problem
Current methods for generating a library of fragmented and tagged DNA molecules from double-stranded DNA (dsDNA) are inefficient in achieving spatial segregation and confinement of DNA fragments, leading to random binding and reduced sequencing accuracy.
Innovation Solution
A sequencing kit and method utilizing a flow cell with chambers and primers, where a monomer or polymer with radical generating and chain elongating functional groups, a radical source, and a crosslinker are used to form a hydrogel matrix, encapsulating genetic material and maintaining spatial segregation of DNA fragments within the chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If current methods are used to generate DNA libraries, then the process is simpler, but spatial segregation and confinement of DNA fragments is poor leading to random binding
Solution Approach 1:
The flow cell is divided into multiple discrete chambers, each capable of independently containing DNA fragments. This segmentation prevents random binding between fragments from different regions and enables precise spatial control of library generation processes.
Solution Approach 2:
Each chamber is equipped with specific primers attached to its surface, creating locally differentiated environments. This allows different biochemical reactions to occur in different chambers simultaneously, with each chamber optimized for its specific function in the library preparation process.
2Measurement precision
If DNA fragments are allowed to bind freely, then the process is faster, but sequencing accuracy decreases due to random binding
Solution Approach 1:
Primers are pre-attached to the chamber surfaces before DNA fragments are introduced. This preliminary preparation ensures that when DNA fragments enter the chambers, they immediately encounter the correct binding partners, reducing random binding events and accelerating specific binding without compromising accuracy.
Solution Approach 2:
The chamber structure acts as an intermediary that mediates the interaction between DNA fragments and primers. By confining fragments within chambers and presenting primers in a controlled manner, the chamber facilitates specific binding while preventing non-specific interactions.
3Stability of the object's composition
If clusters are confined within chambers, then spatial segregation is improved, but the device structure becomes more complex
Solution Approach 1:
The chambers are formed using thin film structures that provide effective confinement of DNA clusters while maintaining a relatively simple overall device structure. The thin film walls of each chamber create stable spatial confinement without requiring complex mechanical or structural components.
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
This approach enhances the spatial segregation and confinement of DNA fragments, reducing random binding and improving sequencing accuracy by confining clusters within chambers, allowing for more precise reconstruction of nucleic acid sequences.
Implementation Method 1
a monomer or polymer including a radical generating and chain elongating functional group; a radical source; and a crosslinker; and a radical initiator as part of the encapsulation matrix precursor composition or as a separate component
Implementation Method 2
a crosslinker; whereby at least some of the encapsulation matrix precursor composition enters at least some of the chambers containing the genetic material; and encapsulating the genetic material in a hydrogel matrix
Data Source
AI summary
An example of a sequencing kit includes a flow cell and an encapsulation matrix precursor composition. The flow cell includes a plurality of chambers and primers attached within each of the plurality of chambers. The encapsulation matrix precursor composition consists of a fluid and a polymer selected from the group consisting of agar, agarose, alginate, heparin, alginate sulfate, dextran sulfate, hyaluronan, pectin, carrageenan, gelatin, chitosan, cellulose, a collagen polymer, and combinations thereof.