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. Author manuscript; available in PMC: 2012 Nov 15.
Published in final edited form as: Spine (Phila Pa 1976). 2011 Nov 15;36(24):2031–2038. doi: 10.1097/BRS.0b013e3181ffdd61

Figure 1.

Figure 1

Diagram showing type IX collagen molecules covalently link to the surface of type II collagen fibrils. Also shown are the two identified sites of tryptophan polymorphisms in type IX collagen.