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Fig. 5 | Journal of Biological Engineering

Fig. 5

From: Using the promoters of MerR family proteins as “rheostats” to engineer whole-cell heavy metal biosensors with adjustable sensitivity

Fig. 5

Using the Parabola Principle to design visible qualitative Hg (II) biosensors. a Parabola of the merR biosensors incubated with 0.25 μmol/L of Hg (II). b The performance of biosensor P429-merR in ultrapure water, natural lake water, and polluted water. c Naked eye observation of biosensor P429-merR incubated with Hg (II) solutions

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