Marquez, B. V., et al. J Nucl Med 2014, 55 (6), 1029-34.
"L19K was synthesized by CPC Scientific and comprised the sequence NO2A-PEG4-GGNECDIARMWEWECFERK-CONH2, with Cys-Cys disulfide bridge and polyethylene glycol (PEG4) as a spacer between peptide and chelator. "
