Gd-DOTA-tuftsin 

Gd-DOTA-tuftsin/Gd-DOTA-tuftsin(Thr-Lys-Pro-Arg)  is a biomarker formed by the binding of gadolinium (Gd) labeled DOTA chelates with tuftsin, mainly used for macrophage specific imaging, especially as a cell specific contrast agent in magnetic resonance imaging (MRI).Gd-DOTA-tuftsin is internalized by macrophages through a mechanism mediated by pro phagocytin receptors, and its pentapeptide analogs (such as Gd DOTA pentapeptide) have higher affinity.

msds of Gd-DOTA-tuftsin