Table 2. Summary of the Chemical and Biological Properties of 1/[⁶⁸Ga]Ga-1 and 2/[⁶⁸Ga]Ga-2^a.

	formula	calculated mass [m/z]	detected mass [m/z]	logD(7.4)	Am [GBq/μmol]	t1/2 in serum [min]	IC50
1/[68Ga]Ga-1	C166H250N36O53	[M + H]3+: 1099.6064; [M + 3H + Na]3+: 1207.2695	[M + H]3+: 1099.6063; [M + 3H + Na]3+: 1207.2641	–3.07 ± 0.01	36	272	integrin αvβ3: 1.39 ± 0.12 μM; EGFR: ND up to 25 μM
2/[68Ga]Ga-2	C174H266N36O56	[M + 3H]3+: 1252.9764; [M + 4H]4+: 939.9841	[M + 3H]3+: 1252.9791; [M + 4H]4+: 939.9860	–3.44 ± 0.08	88	237	integrin αvβ3: 1.48 ± 0.29 μM; EGFR: ND up to 1 mM

^aND: not determinable.