Protein Chemist

W:User:Protein Chemist _____________________

A small peptide (sequence: RRRGGGD) displaying a DelPhi generated electrostatic potential contoured at ±0.1 kT/e with positive potentials colored blue, and negative potentials indicated by red shading.

(R = Arg / G = Gly / D = Asp)

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Chemical structure of an amide linkage in a protein (bottom) and the three-dimensional structure of an amide linkage between an alanine (R2 = CH3) and an adjacent residue (top/inset)