... lactoferrin with a lanthanide ion (Sm3+)at3. 4A ˚resolution. Acta Crystallogr. D55,1799–1804.36. Kitamura, T., Gatmaitan, Z. & Arias, I.M. (1990) Serial quanti-tative image analysis and ... Franke, W.G., Bergmann, R. &Johannsen, B. (1997) Uptake of 169Yb complexes in normal and tumour cells: influence of ligand and metabolic cell activity and stability of cellular association. ... Complexation of ytterbium to human transferrin and its uptakeby K562 cellsXiu-lian Du1, Tian-lan Zhang1, Lan Yuan1, Yong-yuan Zhao1, Rong-chang Li1, Kui Wang1, Siu Cheong Yan2,Li...