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. Author manuscript; available in PMC: 2011 Mar 1.
Published in final edited form as: J Nucl Med. 2010 Feb 11;51(3):454–461. doi: 10.2967/jnumed.109.066902

Figure 2.

Figure 2

RP-HPLC chromatograms of the IMP466 18F-labeling mix (panel A) and the purified 18F-IMP466 (panel B). Red traces represents radioactivity(left y-axis) and blue traces represents UV signal (right y-axis). In the HPLC chromatogram of the crude mixture, unbound “Al18F” eluted with the void volume (Rt = 0.8 min). Two radioactive peaks correspond to the stereoisomers of radiolabeled peptide times (Rt = 17.4 and Rt = 19.8 min). Finally, the unlabeled IMP466 was present in the UV channel (Rt = 21.4 min). After purification, only two radioactive peptide peaks are observed, indicating the formation of two stereoisomers.