Fig. 3. Radiolabelling of aBA-9E7.4 with ¹²⁵I after storage at 4 °C () or – 18 °C ()^a and ²¹¹At after storage at 4 °C () or −18 °C ()^b in Tris buffer 0.5 M at pH 6. Standard conditions: 30 min, 100 μL, 23 °C. ^aCu(OTf)₂pyr₄ (5 mM), 1,10-phenanthroline (5 mM), [¹²⁵I]NaI (1–10 MBq) ^bCu(OTf)₂pyr₄ (2.5 mM), 1,10-phenanthroline (2.5 mM), Tris buffer 0.5 M pH 6/DMF (92.5 : 7.5), [²¹¹At]NaAt (1–5 MBq). RCYs determined by radio-ITLC-SG analysis of the crude product.