Re: [ccp4bb] Non-CCP4 protein purification problem - help needed

2010-12-01 Thread Edward A. Berry
On the DEAE, try lower ionic strength or slightly higher pH, try DEAE-Sepharose instead of cellulose, to get it to stick Try a cation exchange column like carboxymethyl- or phospho- cellulose; at slightly acidic pH if necessary. eab Narayanan Ramasubbu wrote: Hi all: I am trying to purify a pr

[ccp4bb] Non-CCP4 protein purification problem - help needed

2010-12-01 Thread Narayanan Ramasubbu
Hi all: I am trying to purify a protein that was expressed in a baculovirus system. The protein elutes in the flow through in a DE52 column. Further gel filtration gives an enriched protein but we see that some medium components tag along (weight and activity data do not match). Another mutant