question: What is the phenomenon described as "complex coacervation"?
answer: Here, we demonstrate that charge-mediated phase separation, or complex coacervation, of RNAs with cationic peptides can generate simple model liquid organelles capable of reversibly compartmentalizing biomolecules. Impact of macromolecular crowding on RNA/spermine complex coacervation and oligonucleotide compartmentalization. The addition of PEG decreased both the amount of spermine required for phase separation and the coacervation temperature (TC).