Figure 4

One of the hexamer-hexamer interfaces in the C222 ₁ urea structure. The two tyrosine-tyrosine interactions (TyrA14-TyrA14) are flanking a close glutamate-glutamate contact of 2.3 Å. Both glutamates interact with ArgB22 (distance 2.8 Å). There are further two contacts between a GluA17 and GlnA15 from the neighboring hexamer. Residues from the neighboring hexamer are colored blue and marked with an *. Distances are given in Ångström (Å).