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Nature. 1981 Jan 29;289(5796):366-73.

Structure of the haemagglutinin membrane glycoprotein of influenza virus at 3 A resolution.

Abstract

The haemagglutinin glycoprotein of influenza virus is a trimer comprising two structurally distinct regions: a triple-stranded coiled-coil of alpha-helices extends 76 A from the membrane and a globular region of antiparallel beta-sheet, which contains the receptor binding site and the variable antigenic determinants, is positioned on top of this stem. Each subunit has an unusual loop-like topology, starting at the membrane, extending 135 A distally and folding back to enter the membrane.

PMID:
7464906
[PubMed - indexed for MEDLINE]
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