Infographic: DNA Detection with a Chip
Infographic: DNA Detection with a Chip

Infographic: DNA Detection with a Chip

Researchers combine CRISPR technology with a graphene transistor to create an electronic sensor for particular DNA sequences.

Jul 15, 2019
Ruth Williams

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To find out whether a particular genetic variant is present, a purified DNA sample is pipetted onto a transistor loaded with Cas9 and guide RNA. If the Cas9 complex finds its target sequence and binds to it, the transistor’s electrical current is altered, and the change is detected (plus sign) and presented on the device’s digital display.

Target variant detected



Target variant not detected

© george retseck

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