The cells glow green under the high-powered microscope, each bedazzled with a constellation of luminous proteins and RNA that, like oil droplets in water, have huddled together through a process known as phase separation.
A foundational concept in the fields of engineering, chemistry and physics, phase separation — the mechanism by which complex mixtures segregate into distinct components — is beginning to revolutionize biology as well. The process is being hailed as a key organizing principle of the cell.
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