BEAM TIME AVAILABLE FOR MACROMOLECULAR CRYSTALLOGRAPHY AT THE TWO ID BEAMLINES OF NE-CAT AT APS. We currently have a number of days open in March. Below is a brief description of our beam lines, and links with more information. The 24-ID-C beamline can deliver X-rays in the range of 6 to 21 keV or ~2.1 to 0.5 Å. This covers most of the popular elemental edges for phasing. This wide energy-range also makes the beamline well suited for ultra high-resolution data collection and soft X-ray sulfur SAD phasing. The beamline is equipped with an optional kappa goniometer for optimal alignment of crystals. A Pixel Array Detector (PAD), Pilatus-6MF, installed on the 24-ID-C beamline helps measure very weak Bragg reflection intensities due to its noise-less readout technology and also provides a very fast data collection capability in shutter-less data collection mode. The 24-ID-E beamline is a fixed energy microdiffraction beamline delivering X-rays at 12.66 keV, optimized for Se-SAD experiments. It is equipped with an Eiger-16M Pixel Array Detector, offering advantages similar to those of the Pilatus-6MF. For more information on our beamlines (beamline and robot manuals): http://necat.chem.cornell.edu To ask about available time please contact Raj Rajashankar ([email protected]mailto:[email protected]) or Cyndi Salbego ([email protected]mailto:[email protected]) for further information. To apply for General User Time (Rapid Access for current run cycle) please follow this link: https://beam.aps.anl.gov/pls/apsweb/gup0005.start_page Cyndi Salbego Administrator, NECAT 630.252.0689