Q, SP, DEAE, and CM Sepharose Fast Flow are based on a robust, 6% highly cross-linked beaded agarose matrix with good flow properties and high loading capacities. This results in a medium with higher porosity, which is particularly useful for the purification of high molecular mass proteins.Q and SP Sepharose XL media have long chains of dextran coupled to a robust, 6% highly cross-linked agarose matrix. The dextran chains increase the exposure of the Q or SP charged groups, which results in very high loading capacities. The active end of the charged group is the same for DEAE Sepharose Fast Flow and ANX Sepharose Fast Flow (high sub), the difference is the length of the carbon chain of the charged group. DEAE Sepharose Fast Flow has a diethylaminoethyl-group bound to the agarose whilst ANX Sepharose 4 Fast Flow (high sub) has a diethylaminopropyl group attached. After choosing the optimal medium, prepacked columns and bulk media are available for larger scale preparative work.
