Assertion: collagen's strength | /r/HasProperty | the sign of a young skin
Facets:
Source sentences:
text: It is known that collagen 1 has to be coupled with post-translational modifications, as well as anchoring proteins to attach fibers to the extracellular matrix to produce strong, covalently cross-linked tridimensional mature collagen with increased tensile strength, which is the sign of a young skin appearance.17