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# Biotechnology/Health--Basic Research;Plague Enzyme Structure

Ribbon rendering of the structure of AC-IV in Yersina pestis as determined at NIST. The enzyme is a dimer (two identical subunits around a vertical axis), and each of the two subunits forms a central barrel made of eight strands surrounded by short helices. The active site is believed to lie inside the barrel.

*CSTL,adenylyl cyclase,cAMP,crystal structure, plague

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August 17, 2006

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