Fig. 4. Averaging and phase separation create stability out of organizational variability.
(A) Because of the stability of the mRNA and protein products, highly variable and transient promoter-enhancer loops can nonetheless result in consistent numbers of mRNA molecules being transcribed, as well as consistent transcription profiles, within a cell or tissue. (B) Phase separation results in the segregation of molecules or DNA loci and can result in a stable nuclear body forming from a complex combination of variable associations.