“…Several peptides and proteins for selective delivery have been reported, including the somatostatin analogue octreotide, 51,52 collagen fragments, 53 and antibodies. 54, 55 These agents were conjugated to the copper radionuclide via bifunctional chelators incorporating tetaH 4 (1,4,8,11-tetraazacyclotetradecane-N,NЈ,NЉ,Nٞ-tetraacetic acid) 51,53 and dotaH 4 (1,4,7,10-tetraazacyclododecane-N,NЈ,NЉ,Nٞ-tetraacetic acid). 52, 55 Further developments in the design of bifunctional chelators for these applications have also been reported.…”