Re: [ccp4bb] very informative - Trends in Data Fabrication

2012-04-01 Thread Philippe DUMAS
David Briggs drdavidcbri...@gmail.com a écrit : Trollus, Trollum, Trolli, Trollo, Trolli, Trollos, Trollorum, Trollis. Should we say Alea data est or Alea data sunt ? Philippe DUMAS

Re: [ccp4bb] Using intrinsically bound Zn atoms for phasing

2012-03-06 Thread Philippe DUMAS
A reference for a real MAD phasing with Zinc (worked very well): Ennifar et al. MAD phasing replacing magnesium with zinc. Acta Cryst. (2001). D57, 330 Philippe Dumas Bosch, Juergen jubo...@jhsph.edu a écrit : Since you've collected the data already use your favourite data processing

Re: [ccp4bb] New Faster-than-fast Fourier transform

2012-01-20 Thread Philippe DUMAS
. On the other hand, it is possible that somewhere in here lies a clever approach to faster solvent flattening. Ethan Philippe DUMAS, responsable d'équipe Directeur de Recherche au CNRS Equipe de Biophysique Biologie Structurale Unité 'Architecture Réactivité de l'ARN', UPR9002 Institut de

Re: [ccp4bb] how to quantitate protein which dont have ne aromatic residue

2011-04-09 Thread Philippe Dumas
something like a 5µl drop at 1 mg/ml (the order of magnitude should be correct...). Unfortunately, a refractometer is not common in biology labs, but this is a very valuable method. The link between the increment of index of refraction and the protein conc. can be found easily on the web. Philippe

Re: [ccp4bb] Fw: Re: [ccp4bb] Solidarity with Japan

2011-03-16 Thread Philippe DUMAS
transmit the information. Philippe Dumas I was very relieved to learn that my friend and colleague Hideaki Niwa who took his MSc and PhD with me at Birkbeck is safe and well in Japan. I believe that International the Red Cross is doing great work out there and need all the help

Re: [ccp4bb] {Spam?} Re: {Spam?} Re: [ccp4bb] {Spam?} Re: {Spam?} Re: [ccp4bb] units of the B factor

2009-11-20 Thread Philippe DUMAS
What a funny pleasant piece of discussion ! Given any physical quantity Something, having any kind of dimension (even as awful as inches^2*gallons*pounds^-3) Would it exist any room for a discussion about the dimension of 2*Something ? And what about 1*Something ? Philippe Dumas

Re: [ccp4bb] images

2009-03-19 Thread Philippe DUMAS
from back-calculating the images to solving the corresponding structures (and thus also writing the corresponding papers). And write The End (as nauseam, of course ::)) Philippe Dumas Jacob Keller a écrit : Perhaps we could use Poincare's argument(?), that knowing one cross section

Re: [ccp4bb] Weakest protein-protein complex crystallised

2008-07-01 Thread Philippe DUMAS
rapidly protected against the loss of its ligand (and in our case against the binding of a second ligand). Philippe Dumas IBMC-CNRS, UPR9002 15, rue René Descartes 67084 Strasbourg cedex tel: +33 (0)3 88 41 70 02 [EMAIL PROTECTED] [Philippe DUMAS] -Message d'origine- De : Filip Van

Re: [ccp4bb] birefringent spacegroups

2008-06-13 Thread Philippe DUMAS
) and I am somewhat surprised of not seeing any comment on that topics. May be the comments exist, but implicitly in the cited litterature... Now, I am still wondering whether external stresses on biological crystals could indeed induce such unexpected birefringence. Philippe Dumas IBMC-CNRS

Re: [ccp4bb] Help with Superpose results

2008-04-08 Thread Philippe DUMAS
Although this is not a very important issue..., I am a bit surprised by Gerard's insistance for a 'stop calling rmsd rms deviation'. Isn'it a general term in statistical studies, valid for distances separating homologous atoms as well as for any other factor (B factors for example) ? Philippe

Re: [ccp4bb] Help with Superpose results

2008-04-08 Thread Philippe DUMAS
can be used to quantify deviations does not hurt me so much. Thank you anyway... Philippe Dumas IBMC-CNRS, UPR9002 15, rue René Descartes 67084 Strasbourg cedex tel: +33 (0)3 88 41 70 02 [EMAIL PROTECTED] -Message d'origine- De : Ed Pozharski [mailto:[EMAIL PROTECTED] Envoyé : Tuesday

Re: [ccp4bb] radiation damage question

2008-03-03 Thread Philippe DUMAS
Yes indeed ! H2 is one product of H2O radiolysis by recombination of two H radicals. Whether or not the cleavage of iodine (quite efficient under X-rays) is a factor increasing H2 production, I don't know. Philippe Dumas IBMC-CNRS, UPR9002 15, rue Rene Descartes 67084 Strasbourg cedex tel: +33 (0

Re: [ccp4bb] CCP4 rotation convention

2007-08-13 Thread Philippe DUMAS
) is just the Euler matrix defined by (-gamma, -beta, -alpha). Ian, isn't worth the effort ? Philippe Dumas IBMC-CNRS, UPR9002 15, rue René Descartes 67084 Strasbourg cedex tel: +33 (0)3 88 41 70 02 [EMAIL PROTECTED] -Message d'origine- De : CCP4 bulletin board [mailto:[EMAIL PROTECTED

[ccp4bb] Post-doc position

2007-06-18 Thread Philippe DUMAS
in RNA biology. An experience in X-ray crystallography will be strongly appreciated. How to apply: send a CV with a list of publications to Eric Ennifar: [EMAIL PROTECTED] Philippe Dumas IBMC-CNRS, UPR9002 15, rue René Descartes 67084 Strasbourg cedex tel