Center for Genomic Regulation Jun 11 2026 Collagen, the protein that builds skin, bones, tendons and organs, exists inside cells as a liquid-like droplet rather than the long, rigid rod seen in textbooks over the last half century, according to a new study from the Centre for Genomic Regulation (CRG) in Barcelona. The finding, published in the Journal of Cell Biology , is the first direct observation of how the most abundant protein in the human body, which accounts for around a third of total