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. 2018 Nov 12;8(21):5903–5914. doi: 10.7150/thno.27679

Figure 2.

Figure 2

Biochemical characterization of A11 cMb-Cy5.5. (A) Size exclusion chromatography (SEC) elution profiles show A11 cMb, A11 cMb-Cy5.5, and DFO-A11 cMb-Cy5.5 elute in a single peak (27.00 min, 27.07 min, and 27.01 min, respectively), demonstrating the conjugations did not disrupt the minibody dimeric conformation (protein at 280 nm, Cy5.5 at 675 nm). Absorption at 675 nm (Cy5.5) is higher for the conjugated A11 cMb samples. (B) Flow cytometry analysis shows A11 cMb-Cy5.5 binding specifically to 22Rv1-PSCA cells. No binding to control 22Rv1 cells was detected. (C) Saturation binding study of A11 cMb-Cy5.5 (22Rv1-PSCA and 22Rv1 cells) was used to calculate the half-maximal binding KD using a one-site specific binding model (n=3, GraphPad).