TABLE 1

IC₅₀ of Selected CXCR4 Ligands for Binding of ¹²⁵I-FC131 to CXCR4-Expressing Jurkat Cells

Compound	IC₅₀ (nM)
FC131	4.43 ± 0.82
CPCR4-2	177
^natGa-CPCR4-2	4.99 ± 0.72

Data are mean ± SD of 3 experiments, except for values greater than 80 nM.