Before revision: Recent vibrational energy exchange experiments on a protein have been explained employing the relation, not new in itself,between protein and fractal structure. The differnce in the scaling exponent of specific part of the protein entails a distinct vibrational localization property and consequentely a discrepancy in the vibrational energy exchange ) with d \sim 1.8, whereas those associated to non-bonded contacts result simply localized with d \sim 1.}
After revision: Recent vibrational energy exchange experiments on a protein showed the diffusion of vibrational energy does not occur along the backbone interaction,as it might be expected, but prevalently on non-bonded contacts. These results are explained presenting a theoretical picture, supported by computational calculations, that accounts for these different behaviors in vibrational energy exchange ) with d \sim 1.8, whereas those associated to non-bonded contacts result simply localized with d \sim 1.}