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. Author manuscript; available in PMC: 2007 Jul 5.
Published in final edited form as: Bone. 2007 Jan 25;40(5):1343–1351. doi: 10.1016/j.bone.2007.01.011

Figure 1.

Figure 1

Intermolecular cross-links in type I collagen

Diagram showing the sites, type and ratio of pyridinoline cross-links in bone type I collagen. Pyridinolines stabilize type I collagen fibrils of human bone at both ends of the molecule. HP is more abundant at the C-telopeptide-helix cross-link site (HP/LP ratio, 6:1) and LP is more abundant at the N-telopeptide-helix site (HP/LP ratio, 2:1) [19].