Capture Oligonucleotides Control Cluster Density
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Solution Overview
Problem
Current nucleic acid amplification methods require multiple sample titration steps to achieve optimal cluster density on solid supports, which can lead to inefficiencies and losses in sample material, reagents, and increased processing time.
Innovation Solution
A method involving immobilized oligonucleotides on a solid support, where capture oligonucleotides are used to selectively hybridize with template polynucleotides, allowing for controlled density of nucleic acid clusters independent of the original sample concentration, by using a lower density of capture oligonucleotides compared to amplification oligonucleotides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple sample titration steps are used to achieve optimal cluster density, then cluster density control is improved, but processing time and reagent consumption increase
Solution Approach 1:
The invention extracts the density control function from the sample concentration and places it on the solid support through capture oligonucleotides. By immobilizing capture oligonucleotides at a controlled lower density on the solid support, the system decouples cluster density from sample concentration, eliminating the need for multiple titration steps while maintaining precise density control.
Solution Approach 2:
The capture oligonucleotides are pre-immobilized on the solid support at a predetermined lower density before sample application. This preliminary arrangement of capture oligonucleotides establishes the cluster density framework in advance, so that when the sample is applied, clusters form at the desired density without requiring subsequent titration adjustments.
2Manufacturing precision
If multiple sample titration steps are performed, then optimal cluster density is achieved, but sample material loss increases
Solution Approach 1:
The invention extracts the density control function from the sample concentration and places it on the solid support through capture oligonucleotides. By immobilizing capture oligonucleotides at a controlled lower density on the solid support, the system decouples cluster density from sample concentration, eliminating the need for multiple titration steps and the associated sample material loss.
3Manufacturing precision
If capture oligonucleotides are used at lower density than amplification oligonucleotides, then cluster density control is improved, but oligonucleotide design complexity increases
Solution Approach 1:
The capture oligonucleotides serve multiple functions: they selectively hybridize to template polynucleotides, control cluster density through their immobilized concentration, and initiate amplification. This multi-functionality simplifies the overall design by using a single oligonucleotide component to achieve both selection and density control, rather than requiring separate components for each function.
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 eliminates the need for precise titration of nucleic acid samples, reduces reagent usage, and enhances reproducibility by maintaining consistent cluster density across multiple chips, thereby improving the efficiency and reliability of nucleic acid amplification processes.
Implementation Method 1
the template polynucleotides selectively hybridise to the capture oligonucleotides
Implementation Method 2
extending the capture oligonucleotides to generate extension products complementary to the template polynucleotides
Data Source
AI summary
The invention provides methods for controlling the density of different molecular species on the surface of a solid support. A first mixture of different molecular species is attached to a solid support under conditions to attach each species at a desired density, thereby producing a derivatized support having attached capture molecules. The derivatized support is treated with a second mixture of different molecular species, wherein different molecular species in the second mixture bind specifically to the different capture molecules attached to the solid support. One or more of the capture molecules can be reversibly modified such that the capture molecules have a different activity before and after the second mixture of molecular species are attached. In particular embodiments, the different molecular species are nucleic acids that are reversibly modified to have different activity in an amplification reaction.