Cover Caption
About the cover: Alanine mutagenesis screening of SNAP-25 peptides that bind Gβγ. The residues (spheres, red) that had significantly reduced Gβγ binding when mutated to alanine are mapped onto the X-ray crystal structure of ternary snare (Protein Data Bank code 1SFC). See article by Wells et al. on page 1136 of this issue.
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