TDPAC studies of181Hf-labelled transferrin: Comparison between human and rat serum transferrin

A fast BaF2 TDPAC setup was used to study the binding of181Hf to serum transferrin. Two well-defined binding configurations were observed, which are characterized by high EFGs and large asymetry parameter values. The distribution between these configurations depends essentially on the pH of the serum. Small but significant differences between human and rat serum transferrin can be deduced from the electric quadrupole interaction (QI) parameters.