FKBP10 and osteogenesis imperfecta: The failure to detect any linear α2(I) N‐telopeptide fragment can be explained by 100% oxidation of the telopeptide lysine by lysyl oxidase and ensuing intramolecular α1(I)‐α2(I) aldol dimerization, consistent with previous results from FKBP10‐mutant human OI bone.(20) The SDS‐PAGE chain profile and increased acid extractability of the bone collagen support this conclusion.