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Selected folded conformers of arginine–GR. [H = white, C = grey, N = blue, and O = red]. (a) Arginine–GR a; GL interacting with GR with a carboxylic acid group. (b) Arginine–GR b; GL interacting with GR with an amine group. (c) Arginine–GR c; GL interaction with GR in a horizontal way. (d) Arginine–GR D; GL interaction with GR in a horizontal way.
