What protein fibers are bone matrix composed of?

The primary protein fibers of the bone matrix are collagen fibers, specifically type I collagen. Collagen, the main organic component of bone, forms tightly packed fibril structures that provide strength and flexibility to the mineralized bone matrix. Type I collagen molecules self-assemble to form staggered collagen fibrils, which further organize into larger and stronger collagen fibers. These fibers contribute to the unique mechanical properties and tensile strength of bone tissue, acting as a scaffold within the mineralized matrix.