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Science 17 December 2004:
Vol. 306. no. 5704, pp. 2051 - 2053
DOI: 10.1126/science.1107224
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Perspectives

CELL BIOLOGY:
"Pumping" Iron: The Proteins

Ernest Beutler

Iron is vital for life but can be toxic when in excess, so the body has developed ways to carefully maintain stable iron levels. Although numerous proteins involved in iron homeostasis have been identified, it is not clear how they all fit together to regulate iron levels. Two new studies (Nemeth et al.; Meyron-Holtz et al.) fit several more pieces into the puzzle of iron regulation, as Beutler outlines in his Perspective.

The author is in the Department of Molecular and Experimental Medicine, Scripps Research Institute, La Jolla, CA 92037, USA. E-mail: beutler{at}scripps.edu

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