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Specific transferrin binding to L5 and L4-L5 fusions in solid-phase chemiluminescent transferrin binding assay. (A) Specific transferrin binding to L5 fusion (Loop 5) compared to CBD alone (CBD control). (B) Specific transferrin binding to L4-L5 fusion (Loops 4 + 5) compared to CBD alone. RLU, relative luminescence units.
