The Development of the GCPCC Protein Crystallography Beamline at CAMD

The Gulf Coast Protein Crystallography Consortium (GCPCC) is developing a beamline at the LSU/CAMD synchrotron. This beamline will be capable of standard macromolecular multiple-wavelength anomalous diffraction (MAD) phasing experiments over an energy range of 7-17.5 keV. The optical configuration uses a vertical collimating mirror, a channel-cut Si (111) monochromator and a focusing toroidal mirror. Built off of the CAMD 7 T superconducting, energy-shifting wiggler, this beamline will deliver a flux comparable to an NSLS bending magnet protein crystallography (PX) beamline. The beamline delivery and commissioning timetable calls for full 24/7 user operations by October 2001. The beamline design, with supporting calculations and ray tracing, is presented to substantiate the expected performance of this beamline for efficiently collecting accurate MAD data from macromolecules.