Overview
- A peer-reviewed study published on Friday, August 7, 2026, in Science examined five secretions from the land snail Cepaea nemoralis and found collagen VI is the dominant structural protein across all mucus types.
- The researchers showed that modest differences in total and individual protein content control mechanics, with yellow defensive mucus about 4% protein and lubricant mucus about 0.3% protein, which explains their different responses to shear and stretch.
- Teams used proteomics, X-ray diffraction, electron microscopy and staining to map composition and structure and to locate amorphous calcium carbonate granules in mucus glands.
- The study captured ACC granules transforming into crystalline calcite in the epiphragm and proposed ACC acts both as a soluble calcium source to cross-link wet mucus and as a mineral precursor for the hardened dormancy seal.
- Authors and outside experts say these calcium–collagen tuning strategies could inspire new adhesives, wound dressings, and drug-delivery materials, while practical application development remains a next-step research goal.