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Specificity of bacterial detection. Absorption spectra of (a) M13KE, (b) M13-g3p(CTXϕ), (c) M13-g3p(If1), (d) M13-g3p(Pf1), (e) M13-g3p(ϕLf), and (f) M13-g3p(ϕXv) when incubated with different bacterial species and AuNPs. Bacterial species shown are E. coli (F+) (red), V. cholerae 0395 (blue), E. coli (I+) (magenta), P. aeruginosa (orange), X. campestris (pv campestris) (gray), and X. campestris (pv vesicatoria) (green). The spectrum of AuNPs alone (dotted black line) is also shown.
