Fig. 2.

Contact probabilities in interphase chromatin. (A) Schematic of a contact between two loci (green circles) separated by genomic distance $s$ (purple curve). The contact probability between the two green loci $P\left(s\right)$ is proportional to a power law $P\left(s\right)\sim s^{-{\gamma }_i}$ where the subscript i indicates a specific regime. ${\gamma }_i\approx 3/D_i$ within a mean-field approximation, where $D_i$ is the fractal dimension. (B) Schematic plot of the average contact probability $P\left(s\right)$ for chromatin as a function of genomic separation $s$ with three scaling regimes on a log–log scale.