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BIOCHEMISTRY: An Enzyme Assembly Line Janet L. Smith and David H. Sherman Science 5 September 2008: 1304-1305. Summary: Fatty acid synthases and related megaenzymes are highly adaptable to new functions as a result of their modular architecture. The Crystal Structure of a Mammalian Fatty Acid Synthase Timm Maier, Marc Leibundgut, and Nenad Ban Science 5 September 2008: 1315-1322. A high-resolution structure of mammalian fatty acid synthase reveals that this enzyme is derived from an iterative polyketide synthase and has five active catalytic domains. Experimental Test of Self-Shielding in Vacuum Ultraviolet Photodissociation of CO Subrata Chakraborty, Musahid Ahmed, Teresa L. Jackson, and Mark H. Thiemens Science 5 September 2008: 1328-1331. The anomalous variation of oxygen isotopes in early meteorites is produced by excited states during photodissociation of carbon monoxide, not by self-shielding, as was thought. Identification of Active Gold Nanoclusters on Iron Oxide Supports for CO Oxidation Andrew A. Herzing, Christopher J. Kiely, Albert F. Carley, Philip Landon, and Graham J. Hutchings Science 5 September 2008: 1331-1335. High-resolution microscopy showed that the most effective catalytic gold species on an iron oxide support were those forming bilayer clusters of just 10 atoms. ÏÂÔØµØÖ·£ºhttp://www.namipan.com/d/9a7b2fb ... 62ccd0201f78d973001¡¡£Û£±£¹£Í£Ý |
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