OPERATION OF BEAMLINE X 9A RESOURCE DEDICATED TO TIME RESOLVED XRAY FOOTPRINTING

为了提供足迹技术的专用通道， 国家同步加速器光源的X9 A沿着与 一个专用的停流仪器，允许足迹研究， 我们扩大的调查小组 光束线接受高达5 毫弧度的白色光束，通量密度为109 光子/s/mm 2/0.07%带宽，有效能量范围为3-30 凯 专用的光束线对于激光器的高生产率是必要的。 核心和合作研究项目。 我们的资源是世界 该技术的领先者，并提供专用光束线 我们将继续在这一领域发挥领导作用。 我们现在经常 在5-10毫秒和更长的时间尺度上进行足迹研究 我们的断流装置 理解RNA的重大进展 蛋白质-DNA复合物的研究 组建已经启动。 专用足迹光束线 将于一九九九年年底迁往新车站（X28 C）， 新的晶体学项目 资源已被赋予 NSLS访问新光束线。

To provide dedicated access to footprinting technology, beamline X9A at the National Synchrotron Light Source is maintained along with a dedicated stopped flow instrument to allow footprinting studies for our expanded group of investigators. The beamline accepts up to 5 milliradians of white beam, with a flux density of 109 photons/s/mm2/0.07% bandwidth over an effective energy range of 3-30 keV. A dedicated beamline is necessary for high productivity of the core and collaborative research project. Our Resource is the world leader in this technology and the availability of a dedicated beamline will continue our leadership in this area. We are now routinely conducting footprinting studies on 5-10 msec and longer timescales with our stopped flow device. Major advances in understanding RNA folding have been accomplished and studies of protein-DNA complex formation have been initiated. The dedicated footprinting beamline will be moved to a new station (X28C) in late 1999 to make way for the new crystallography program at X9A. The resource has been given access to the new beamline by the NSLS.