Figure 9From: Iron specificity of a biosensor based on fluorescent pyoverdin immobilized in sol-gel glassFluorescence of purified pyoverdin solution (3.0 μM) in response to ferrous and ferric ion. Data points are mean values of fluorescence 10 min. after the addition of iron (II or III). Error bars indicate ± standard deviation. The initial fluorescent intensity (before addition of iron) was set to 100%. (ex/em = 390/452 nm)Back to article page