I have one unknown protein of molecular weight 31 kDa. pI 8.2, stable at around pH 4- pH 10, expressed in soluble fraction at 10-12 mg per liter of original culture.
Thats all i have?
on the basis of molecular weight i think so i cant go for molecular sieve chromatography. But as it has pI of 8.2 and stable in acidic pH, I think so i should go for cation exchange chromatography.
Am i going rite?
and what does the lat part mean, expressed in soluble fraction at 10-12 mg per liter of original culture - --------> can we determine any technique from this information or its just for column capacity selection. If yes what should be the column capacity.