A protocol for the extraction of a periplasmic transition metal chaperone in the context of its native binding partners, and biophysical characterization of its substrate contents by X-ray fluorescence and radiometal uptake is presented.
Radka, C. D., Radford, L. L., Massicano, A. V., DeLucas, L. J., Lapi, S. E., Aller, S. G. Essential Metal Uptake in Gram-negative Bacteria: X-ray Fluorescence, Radioisotopes, and Cell Fractionation. J. Vis. Exp. (132), e57169, doi:10.3791/57169 (2018).