Figure 1

A view of the MS2 coat protein dimer with its two polypeptide chains shown as blue and red ribbons. The positions of amino acids altered in this study by site-directed mutagenesis are shown as yellow (glycine13), green (glycine14), magenta (threonine15), cyan (glycine113) and white (aspartic acid114). For details of the structure of MS2 coat protein see refs. 12 and 13.