DNA Strand Displacement Brink Control for Delayed Enzymatic Reactions
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Solution Overview
Problem
Existing CRN-based controllers require a large number of chemical reactions due to the dual-rail representation method, increasing complexity in DNA implementation and making it difficult to achieve ultrasensitive input-output responses.
Innovation Solution
An implementation method for a Brink controller based on DNA strand displacement that uses a time delay factor and a compensation mechanism to reduce the number of chemical reactions, allowing for ultrasensitive input-output responses with fewer reactions and simplified DNA implementation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the dual-rail representation method is used in CRN-based controllers, then the controller can be implemented, but the number of chemical reactions increases significantly, increasing DNA implementation complexity
Solution Approach 1:
The patent extracts and eliminates the subtraction operation from the CRN-based controller design. By removing the need for dual-rail representation and subtraction circuits, the implementation complexity is significantly reduced while maintaining the essential control functionality. The controller achieves its purpose using only addition and regulation operations.
Solution Approach 2:
Instead of using the conventional dual-rail approach with subtraction, the patent inverts the design philosophy by using a single-rail representation with only addition operations. This inversion fundamentally changes the implementation approach, reducing the number of required chemical reactions and simplifying the DNA implementation.
2Reliability
If more chemical reactions are used to implement the controller, then the control functionality can be achieved, but the DNA implementation becomes more difficult and complex
Solution Approach 1:
The patent removes unnecessary chemical reactions from the controller implementation. By eliminating subtraction operations and dual-rail representation, the design achieves reliable control functionality with a minimized set of chemical reactions, directly reducing DNA implementation complexity.
3Adaptability or versatility
If the conventional CRN-based controller structure is used, then the controller can regulate the system, but the number of CRNs required increases, increasing the difficulty of DNA implementation
Solution Approach 1:
The patent extracts and removes the dual-rail representation mechanism from the controller design. This elimination reduces the number of required CRNs while preserving the essential system regulation capability, as the controller can achieve its control objectives using only addition-based operations.
Solution Approach 2:
The patent inverts the conventional approach by adopting a single-rail representation instead of dual-rail. This inversion reduces the number of CRNs needed while maintaining the controller's ability to regulate the system, as it eliminates the need for complementary signal pairs and subtraction operations.
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 reduces the complexity of DNA implementation by minimizing the number of required chemical reactions and achieves ultrasensitive responses by introducing a time delay and compensation mechanism, ensuring the output substance approaches the target level in a quasi-steady state.
Implementation Method 1
an implementation method for ultrasensitive Brink control for a delayed enzymatic reaction based on DNA strand displacement
Data Source
AI summary
Disclosed is an implementation method for ultrasensitive Brink control for a delayed enzymatic reaction based on DNA strand displacement (DSD), relating to the field of feedback control technology based on DSD in biological systems. The method includes obtaining an enzymatic reaction process model with time delay; constructing a CRN-based Brink controller; obtaining a static mapping expression between an output of the Brink controller and an output of the system under a steady state condition; constructing a Brink controller by DSD reaction; obtaining a time delay representation, and applying it to DNA implementations of the enzymatic reaction process model; and combined with the Brink controller, controlling a delayed enzymatic reaction process model. The present invention is structurally free of subtraction, reduces the number of abstract chemical reactions required to implement, and greatly simplifies DNA implementation.