Fig. 9
From: Validation and calibration of a novel GEM biosensor for specific detection of Cd2+, Zn2+, and Pb2+
Time-dependent fluorescent responses of E.coli-BL21-pJET2.1-CadA/CadR-eGFP cells. The X-axis represents time, the Y-axis represents heavy metal concentration, and the Z-axis represents fluorescent intensities in CTCF. The gradual increment of CTCF signal is indicated by the red arrow. A Cd2+ treatment plot. B Zn2+ treatment plot. C Pb2+ treatment plot