Toyopearl SP-550 is a strong cation exchanger useful for purification of molecules such as insulin and proteins up to 100kD. It is used for high throughput capture of feedstocks.
Catalog -- Process Media, Ion Exchange Chromatography
Comparative information for CIEX resins
Influence of pore size on Lysozyme DBC for Toyopearl cation exchangers @ 100cm/hour
pKa's for Ion Exchange groups