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X-ray studies show that influenza hemagglutinin (HA) forms an elongated structure connecting the influenza virus at one end to cell-surface receptors at the other. At neutral pH, the 20 N-terminal residues of HA2-referred to as the fusion peptide-are buried in a hydrophobic pocket, about 100 Å away from the receptor-binding site, and thus seem unlikely to affect HA binding to the receptor. To test...
Monensin is one of the best-characterized ionophores; it functions in the electroneutral exchange of cations between the extracellular and cytoplasmic sides of cell membranes. The X-ray crystal structures of monensin in free acid form and in complex with Na + , K + and Ag + are known and we have recently measured the diffusion rates of monensin in free acid form (Mo-H) and...
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