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. 2014 Mar 7;4(1):291–314. doi: 10.3390/biom4010291

Figure 4.

Figure 4

Excess energy of contacts, i.e., the difference between the interaction energy of the natural sequence and the one of the sequence with optimal stability, versus contact distance |ij|. One can see that short-range contacts are more attractive than expected on a stability ground, and this effect increases with chain length and with the absolute contact order (ACO). Reproduced with permission from [74] (Wiley ©).