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. 2020 Sep 23;10:15519. doi: 10.1038/s41598-020-72452-2

Figure 2.

Figure 2

(A) Uptake of different radiolabelled, fluorescent conjugates normalized to uptake in iron-depleted media of the respective compound. Grey bars represent control conditions with TAFC. Blocking with [Fe]TAFC reduces cellular uptake due to competition with the natural substrate of the MirB transporter. Fe (+) represents iron-replete conditions, which decreases biosynthesis of the MirB transporter. (B) Competition assay of [68Ga]Ga‐TAFC blocked with iron-containing fluorophore compounds in iron-depleted minimal medium. Values that are lower compared to the [68Ga]Ga‐TAFC uptake of control (grey bars), indicate a specific interaction of the fluorophore conjugate with the MirB transporter. Data of [Fe]DAFC-Cy5 are adapted from reference18.