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(a) Normalized average absorbance spectra for 9 replicates of E. coli O157 biosensor; (b) E. coli O157 specificity results analyzed by peak wavelength shift from 520 nm and conducted with 10 ng/µL of DNA, 9 replicates per sample (n = 9). Error bars represent 95% confidence intervals. (C, water; NT1, E. coli C-3000; NT2, S. Enteritidis; NT3, Listeria spp.; NT4, B. cereus).
