Pd(en) as a Sequence-Selective Molecular Pinch for α-Helical Peptides
A palladium(II)(ethylenediamine) complex was found to selectively stabilize α-helix conformation of peptides having two histidine (His) residues at i and i + (3 or 4) positions, whereas the helix conformation of the other peptides having one or two His at different positions is destabilized.