IEC DEAE-825 and Asahipak ES-502N are packed with weak
anion exchange resins bonded with diethylaminoethyl groups. The pKa of diethylaminoethyl
groups is approximately 7.8, therefore DEAE-825 and ES-502N are generally recommended
for the separation of acidic proteins and used most commonly for ion exchange
chromatography of proteins. DEAE-420N packed with non-porous gel is suitable for
fast analysis.
