Fig. 4From: Probing the subcutaneous absorption of a PEGylated FUD peptide nanomedicine via in vivo fluorescence imagingOverlay of reversed phase high performance liquid chromatography (RP-HPLC) chromatograms showing fluorescence activity and preservation of relative retention times of sulfo-Cy5 labeled FUD and its sulfo-Cy5 labeled 10–40 kDa PEG conjugates. The analysis was made using a C8 column and an elution gradient composed of H2O + 0.1% FA in the A side and acetonitrile + 0.1% FA in the B sideBack to article page