Fig. 10
From: Validation and calibration of a novel GEM biosensor for specific detection of Cd2+, Zn2+, and Pb2+
Calibration plot of heavy metal treatments correlating fluorescent intensities in CTCF with heavy metal concentrations in ppb. The plot encompasses metal ion concentrations ranging from 1 to 6 ppb. Cd2+, Zn2+, Pb2+, Ni2+, Fe3+ and AsO43− are represented by the colours Ash, Blue, Orange, Green, Yellow and Light Blue, respectively. Each plot illustrates the CTCF variation corresponding to the metal ion concentration. Dotted lines indicate trendlines for each metal ion, along with their respective R2 values. Error bars represent the standard mean differences derived from three independent biological treatments. A single asterisk (*) represents a P value less than 0.05 (P < 0.05), indicating statistical significance at the 0.05 level. Double asterisks (**) represent a P value less than 0.01 (P < 0.01), indicating statistical significance at the 0.01 level. Triple asterisks (***) represent a P value less than 0.001 (P < 0.001), indicating statistical significance at the 0.001 level