Assuming that your 2d crystals are membrane proteins and are truly 2d (one layer thick), how can there be a screw axis?
JPK On Sat, Nov 27, 2010 at 12:02 PM, Jeffrey D Brodin <[email protected]> wrote: > Hi all, > > I'm currently working on a project where we are attempting to compare a > single crystal X-ray structure with 2D crystals we've imaged with TEM. I have > nice 2D cyrstals and low dose cryo images. > > My question is whether there is a program in ccp4 that will let you input a > model and then generate a 2D projection using different plane groups. We are > pretty sure, based on electron diffraction, that the 2D crystals contain a > screw axis, as did the X-ray structure. Also, after generating the images, is > there another program that will calculate structure factors and a diffraction > pattern? Thanks in advance for the help, > > Jeff Brodin
