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Three-residue c:D7-a:K12/c:D10-a:K12 network containing axial and lateral DK salt bridges. (A) Salt bridges are depicted in both sequence and structure. (B and C) c:D7 (B) and c:D10 (C) were mutated to Ala and Lys, mixed with peptides a and b, and characterized by thermal denaturation, monitored at 225 nm by CD spectroscopy.
