Re: [ccp4bb] detect dsDNA

2011-10-02 Thread Poul Nissen
We chewed pills with EtBr as kids in school to see if we brushed our teeth well - red colour on the edges, bad boy Poul On 01/10/2011, at 19.12, Jacob Keller j-kell...@fsm.northwestern.edu wrote: I actually looked at an EtBr MSDS a while ago, and was shocked at how benign it was. I also

Re: [ccp4bb] detect dsDNA

2011-10-02 Thread Edward A. Berry
Jacob Keller wrote: I actually looked at an EtBr MSDS a while ago, and was shocked at how benign it was. I also heard from someone that they used to feed it to Argentinian cows routinely a few years back... Wikipedia says it was used as a trypanosomacidal - It's being discontinued not because

Re: [ccp4bb] detect dsDNA

2011-10-02 Thread Florian Schmitzberger
There exists a less toxic chemical than EtBr to stain DNA: SYBR safe DNA stain (a fluorescence dye sold by a certain vendor). Another benefit is to be able to use blue light, reducing UV/VIS light exposure when handling gels. Florian On Oct 2, 2011, at 11:49 AM, Edward A. Berry wrote:

Re: [ccp4bb] detect dsDNA

2011-10-02 Thread Dima Klenchin
There exists a less toxic chemical than EtBr to stain DNA: SYBR safe DNA stain (a fluorescence dye sold by a certain vendor). SYBR Safe is about 10X less sensitive though. I suspect that not many chemicals in the lab are less toxic/mutagenic than EthBr. The classic Ames test shows that 5 ug

Re: [ccp4bb] detect dsDNA

2011-10-02 Thread Tommi Kajander
i wouldn't recoommend that. here is the info from somebody forwarded from our genetics department with regards to safety of that while back Sybr is just as toxic/poisonous/harmful as ethidium bromide, only far more expensive. There have been very few tests concerning it's use up

Re: [ccp4bb] detect dsDNA

2011-10-02 Thread Dima Klenchin
There exists a less toxic chemical than EtBr to stain DNA: SYBR safe DNA stain (a fluorescence dye sold by a certain vendor). SYBR Safe is about 10X less sensitive though. Can you do the toothbrush test with SYBR Safe? I wouldn't do that. As it is considerably more hydrophobic, I'd expect

Re: [ccp4bb] detect dsDNA

2011-10-01 Thread James Stroud
If you can reproduce the crystals and have the material 1. Harvest several large crystals. 2. Make several transfers to fresh mother liquor to wash. 3. Dissolve in DNA loading dye without SDS 4. Run on a native gel (e.g. 6% polyacrylamide, 0.5XTBE, etc.). 5. Include positive control lanes for

Re: [ccp4bb] detect dsDNA

2011-10-01 Thread Juha Vahokoski
Also this method might be useful if crystals tolerate the treatment. Regards, Juha Fluorescence detection of nucleic acids and proteins in multi-component crystalshttp://onlinelibrary.wiley.com/doi/10.1107/S0907444905035365/abstractActa Crystallographica Section D Volume 62, Issue 2, February

Re: [ccp4bb] detect dsDNA

2011-10-01 Thread Kay Perry
If your DNA is small enough, you can run a control dsDNA lane on the gel. dsDNA will show up on silver stain but the oligomer has to be small enough to enter the gel. Kay On Sep 30, 2011, at 10:37 PM, zq deng dengzq1...@gmail.com wrote: Hi all, . recently,I got a crystal of protein-DNA

Re: [ccp4bb] detect dsDNA

2011-10-01 Thread Phoebe Rice
+0800 From: CCP4 bulletin board CCP4BB@JISCMAIL.AC.UK (on behalf of zq deng dengzq1...@gmail.com) Subject: [ccp4bb] detect dsDNA To: CCP4BB@JISCMAIL.AC.UK Hi all, . recently,I got a crystal of protein-DNA crystal.i used silver stainto prove that it is a protein crystal.Does anyone

Re: [ccp4bb] detect dsDNA

2011-10-01 Thread Jacob Keller
I actually looked at an EtBr MSDS a while ago, and was shocked at how benign it was. I also heard from someone that they used to feed it to Argentinian cows routinely a few years back... JPK On Sat, Oct 1, 2011 at 1:56 AM, James Stroud xtald...@gmail.com wrote: If you can reproduce the crystals

[ccp4bb] detect dsDNA

2011-09-30 Thread zq deng
Hi all, . recently,I got a crystal of protein-DNA crystal.i used silver stainto prove that it is a protein crystal.Does anyone have method to detect if there is DNA in the crystal. any suggestion will be appreciated. Regards, deng

Re: [ccp4bb] detect dsDNA

2011-09-30 Thread Dunten, Pete W.
board [CCP4BB@JISCMAIL.AC.UK] On Behalf Of zq deng [dengzq1...@gmail.com] Sent: Friday, September 30, 2011 8:36 PM To: CCP4BB@JISCMAIL.AC.UK Subject: [ccp4bb] detect dsDNA Hi all, . recently,I got a crystal of protein-DNA crystal.i used silver stainto prove that it is a protein crystal.Does