Nawrot C F, Campbell D J
J Dent Res. 1977 Aug;56(8):1017-22. doi: 10.1177/00220345770560080401.
The affinity of a bone collagen alpha1 chain for hydroxyapatite has been compared to a similarly isolated skin component from the same animals. The chain from bone exhibits a higher affinity for the mineral. This enhanced affinity appears to be related to its primary structure, specifically its hydroxylysine moieties.