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[资源] 《Science》(化学、材料)连载----(5 September 2008)

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.

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