Re: [ccp4bb] laboratory phage infection [SEC=UNCLASSIFIED]

2013-03-03 Thread Mark J van Raaij
Dear All, As we also work with phages in the lab, we unfortunately have some experience with this (although the phages we work with haven't been identified in our cultures). I second Tassos suggestion to close down normal operations for a week or more and clean with the whole lab involved and

Re: [ccp4bb] laboratory phage infection [SEC=UNCLASSIFIED]

2013-03-03 Thread Anastassis Perrakis
We have suffered from that a lot at the NKI a few years back. What worked for us was a combination of strategies, that were all mentioned before but I will repeat: 1. Buy T1 phage-resistant strains, and also use an old incubator (and luckily an old building that was available at the time) to 'e

Re: [ccp4bb] laboratory phage infection [SEC=UNCLASSIFIED]

2013-03-03 Thread aidong
Dear Opher, It was also our idea how to get over it since several years ago. We did it based on a philosophy that any bacteria infected with a phage will not be infected by the same phage again. Therefore, we let our BL21/DE3 strain infected in the lab and when most were died, some cells

Re: [ccp4bb] laboratory phage infection [SEC=UNCLASSIFIED]

2013-03-02 Thread Opher Gileadi
Hi, We had a massive phage infection at the SGC in 2004; all our washing and sterilization efforts could only solve the problem temporarily. I then recovered a phage-resistant subclone of BL21(DE3), and prepared derivative strains with pRARE2 (the tRNA plasmid in Rosetta2) or other plasmids. We

Re: [ccp4bb] laboratory phage infection [SEC=UNCLASSIFIED]

2013-03-02 Thread Antony Oliver
Dear Aidong, Some thoughts... Are you sure the problem is actually phage-related? I ask because you are still having problems using phage-resistant stains... Acid-washing your glassware, and a long-dry autoclave sterilisation (as previously suggested) should really do the trick. A good *manu

Re: [ccp4bb] laboratory phage infection [SEC=UNCLASSIFIED]

2013-03-02 Thread Matthias Zebisch
Dear Aidong, we never had that problem but I heard that only long dry(!) heat treatment of glassware destroys the phages. No need to say that you have to do it with ALL your glassware. Good luck, Matthias - Dr. Matthias Zebisch Division of Structural B

Re: [ccp4bb] laboratory phage infection [SEC=UNCLASSIFIED]

2013-03-02 Thread aidong
Many thanks for your rapid inputs. We used to make glyerol stocks but now we do not since the protein expression is not stable. Our lab is about 10 students, who have to make their own proteins so our three large-scale shakers are very crowded every day. We did try a formaldehyde gas trea