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Revision as of 18:07, 17 October 2017

Description

Design

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Measurement

Applied Design

Final Results

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Detector

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Silver

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Gallery

Interview with Dr. Keith Pardee

Regarding his recent study (Pardee et al., 2016)

We read your paper from last year titled “Rapid, Low-Cost Detection of Zika Virus Using Programmable Biomolecular Components” and we wanted to know, what led you to use β-galactosidase as a colored readout?

Dr. Pardee: At that time, we hadn’t considered using C2C2 (Cas13a). So, one of the reasons was because of the enzyme activity. Single molecule of reporter could serve amplification, rather than just fluorescence. The other (reason) was just for practical use. No need (to use) UV lights, electronics, camera, and could be done in a simple piece of paper. Tried 10 different enzyme options with other based reporters.

What was your motivation to build that detector on your study?

Dr. Pardee: Multiplexing, being able to track multiple reactions at the same time, and the potential for quantification. These processes are semi-quantitative and so with that information, you want to be able to read rather than just being plus minus, being able to calibrate your reactions. You might be not being able to say exactly how much you have but you may be able to say this is a high titer or a low titer individual. Also, user accessibility, if you can automatize some of this tests for reading like in pregnancy tests with a digital detector… can make it really easier to use.
Diagram for Cas13a's function

iGEM BOKU Vienna

Michael and Julian from the iGEM BOKU Vienna came to do some experiments in our lab on 4th and 5th of October. Their iGEM project is called D.I.V.E.R.T. (Directed in vivo evolution via reverse transcription) and they are trying out new strategies for in vivo evolution which shows potential advantages over classical in vitro methods. For this they use yeast and E.coli to demonstrate their concept. They used the flow cytometer in our lab in Garching to better characterize their constructs from E.coli and S. cerevisiae. For the use one of our lab member explained them how to use the flow cytometer in the lab and also provided them the necessary help. It was a long day work for them but they got convincing results by the end. We also had a small gathering in the evening before they left together with the old igemers who came to meet us. We were very happy to have them in our lab and to get to know each other's team.