Team:UC Davis/Signal Processing

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  <h2>Mathematical Approach</h2>
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  <a href="https://2014.igem.org/Team:UC_Davis/Signal_Math">
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    <span><h2>Mathematical Approach</h2></span>
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  <h2>Testing Our Model</h2>
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  <a href="https://2014.igem.org/Team:UC_Davis/Signal_Test">
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    <span><h2>Testing Our Model</h2></span>
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  <h2>Olive Oil</h2>
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    <span><h2>Olive Oil</h2></span>
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<p><b>Our signal processing data set can be downloaded <a href="https://static.igem.org/mediawiki/2014/0/09/MultiplexingFinalData.xls" class="brightlink">here</a></b>.</p>
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<p>Mathematical Approach</p>
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<img src="https://static.igem.org/mediawiki/2014/5/54/CatalyticMatrix.png" width="400px" style="border:1.5px solid #212f20;"/>
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Our mathematical model consists of a simple 3x3 array which we call the catalytic matrix. Using a few tricks from linear algebra, we created a way of predicting the concentrations in a three-enzyme biosensor. The main assumption of the model is that the substrates involved do not competiviely inhibit each other. <br><br></p>
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<p><b>To read more about our mathematical approach, click <a href="https://2014.igem.org/Team:UC_Davis/Signal_Math" class="brightlink">here</a></b>.</p>
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<p>Testing Our Model</p>
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<p align="center"><img src="https://static.igem.org/mediawiki/2014/1/1d/64Combinations.png" width="800px" style="margin-left:auto;margin-right:auto;"/></p>
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To test our model, we built a combinatorial set of aldehydes, and compared our predicted concentrations with known values. The results suggested we needed to take a new approach. We taught our computer to solve the problem, and it worked. By randomizing the values in the catalytic matrix, we found that there was a vector space that could model our competitively inhibited system.</p><br><br>
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<p><b>To read more about our mathematical approach, click <a href="https://2014.igem.org/Team:UC_Davis/Signal_Test" class="brightlink">here</a></b>.</p>
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<p>Olive Oil</p>
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<p>With a working model, it was time for the ultimate test: Olive Oil<br><br>
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Nine samples of Extra Virgin Olive Oil were obtained and <a href="https://2014.igem.org/Team:UC_Davis/Protein_Engineering_Test" class="brightlink">prepared</a> for assay. The velocities were recorded with each enzyme for a total of 27 data points. We used the best catalytic matrix from our previous model and again inverted the matrix and multiplied by the observed velocity. The results are plotted below.</p><br>
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<p align="center"><img src="https://static.igem.org/mediawiki/2014/1/19/OliVEoil_Set.jpg" style="margin-left:auto;margin-right:auto;border:1.5px solid #212f20;"/></p><br>
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Development began on the protoboard. Circuit designs were prepared using the CheapStat as a reference. SMD-ICs were soldered to DIP adapters and the potentiostat was wired for the first time. The protoboard became the primary device with which to develop the software. The protoboard was not designed with a switch to control current ranges, it did include noise however. <img src="https://static.igem.org/mediawiki/2014/3/32/UCDavis_LessThanDesirable.png " height="250px" style="float:right;margin:10px 0 0 10px;"/>Fast Fourier transform of the recorded signal showed that the largest component was from the 60 Hz range. Extensive testing showed that the noise was related to the protoboard itself as the signal persisted long after components were deteced. There was no other option but to continue the development by creating a printed circuit board.
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<p><b>To read more about how our model did when testing olive oil, click <a href="https://2014.igem.org/Team:UC_Davis/Signal_oil" class="brightlink">here</a></b>.</p>
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Latest revision as of 03:49, 18 October 2014

UC Davis iGEM 2014

Mathematical Approach

Mathematical Approach

Testing Our Model

Testing Our Model

Olive Oil

Olive Oil

Our signal processing data set can be downloaded here.

Mathematical Approach

Our mathematical model consists of a simple 3x3 array which we call the catalytic matrix. Using a few tricks from linear algebra, we created a way of predicting the concentrations in a three-enzyme biosensor. The main assumption of the model is that the substrates involved do not competiviely inhibit each other.

To read more about our mathematical approach, click here.

Testing Our Model


To test our model, we built a combinatorial set of aldehydes, and compared our predicted concentrations with known values. The results suggested we needed to take a new approach. We taught our computer to solve the problem, and it worked. By randomizing the values in the catalytic matrix, we found that there was a vector space that could model our competitively inhibited system.



To read more about our mathematical approach, click here.

Olive Oil

With a working model, it was time for the ultimate test: Olive Oil

Nine samples of Extra Virgin Olive Oil were obtained and prepared for assay. The velocities were recorded with each enzyme for a total of 27 data points. We used the best catalytic matrix from our previous model and again inverted the matrix and multiplied by the observed velocity. The results are plotted below.



To read more about how our model did when testing olive oil, click here.