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The energy profiles corresponding to the lowest energy path on the d,ϕ-map between 6HB, 4HB, and 2HB states as a function of the rotation angle ϕ between monomers. Profiles are shown for four experimental gramicidin structures: □, 1MAG; ○, 1JNO; Δ, 1JO3; and ∇, 1JO4.
