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. 2009 Feb 3;37(4):e33. doi: 10.1093/nar/gkp014

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© 2009 The Author(s)

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.0/uk/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 2. — Electro-genetic circuits. (a) Mammalian cell-based integrator. The CPU was connected to DC of different intensities and for various periods of time; the product of time and current intensity was kept constant (t × I = constant). The resulting acetaldehyde levels and electric output signals were scored after 24 h. (b) Mammalian cell-based AM detector. The CPU was connected to an AC of 50 Hz and different intensities for 1 h and the acetaldehyde levels as well as the electric output current were quantified after 24 h. (c) Mammalian cell-based FM detector. The CPU was connected to an AC of 50 mA and different frequencies for 1 h and the acetaldehyde levels as well as the electric output current were quantified after 48 h.