DOTA-GA-maleimide is a bifunctional chelator containing a DOTA macrocycle chelator, a GA linker, and a maleimide reactive group. DOTA-GA-maleimide can achieve radiolabeling of proteins by forming a stable coordination complex between the DOTA macrocycle and radioactive metal ions (such as 111In) through the specific binding of maleimide to protein thiol groups. DOTA-GA-maleimide can be used for SPECT imaging studies of MMP activity-related cancers[1][2].
