Posted 27 January 2009 - 06:29 PM
First after i ran the column, and eluted my protein there was a faint yellow band at the top of the gel, i presume left overs of the sample, but i attempted to force it off the column with 2M NaCl and it still would not budge. Does anyone have any incite on this situation.
Secondly, the sample that i am injecting is 0.200ml and when i collect all of the solution that gave a signal on my UV detector i ended up with almost 200ml of solution, there was also visual confirmation that it was in fact ferritin coming off of the column since it was yellow. Is this a normal amount for a sample of that size to increase to that kind of volume?
Thanks for any suggestions or comments.
Posted 27 January 2009 - 08:52 PM
I am not sure if this would help, but worth reading.
I can't comment on the first question you raised......however, if it didn't come out with 2M NaCl, its less likely to interfere with yr further analysis. Can u elute ferritin in somethign else, which may just bring it down?
For the second question, its a trade off. WhenI purify my protein on ion exchange, I surely purify it, but it gets diluted out. So whereever i am looking for concentration, i don't look for purity. What i mean is that i load samples which are relatively pure and elute them out using a running gradient so that everything comes out in a low volume but surely at a higher concentration.
Posted 28 January 2009 - 01:13 PM
Posted 28 January 2009 - 02:41 PM
talent does what it can
genius does what it must
i used to do what i got paid to do