Fig. 2From: Probing the subcutaneous absorption of a PEGylated FUD peptide nanomedicine via in vivo fluorescence imagingIon-exchange (IEX) chromatogram showing separation of singly labeled FUD-Cy5 from unreacted and multiply labeled FUD. The sample was loaded onto an anionic exchanger and eluted via application of a mobile phase gradient containing 20 mM Tris (pH 8) in the A side and 1 M NaCl in 20 mM Tris Buffer (pH 8) in the B sideBack to article page