Why do identical cells act differently? Team unravels sources of cellular 'noise'

Researchers have taken an important step toward explaining why genetically identical cells can produce varying amounts of the same protein associated with the same gene. Researchers demonstrated that most of the fluctuations in gene expression between identical cells occur in the first step of protein production, called transcription.

source https://www.sciencedaily.com/releases/2020/10/201014161648.htm