CD73, also known as ecto-5'- nucleotidase (NT5E), is a 70 kDa glycosylphosphatidylinositol (GPI)-anchored cell surface enzyme that catalyzes the
dephosphorylation of extracellular adenosine monophosphate (AMP) to adenosine. It is a key regulator of purinergic signaling and plays a critical role in modulating immune responses, inflammation, and tissue regeneration 1.