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. Author manuscript; available in PMC: 2019 May 1.
Published in final edited form as: Bone. 2018 Feb 2;110:128–133. doi: 10.1016/j.bone.2018.01.028

Figure 2.

Figure 2

Mass spectrum of the Collagen I alpha 1 peptide (GLTGPIGPPGP(OH)AGAP(OH)-GDK(CML)GESGPPSGPAGPTGAR) from donor 79M; 42% of Collagen I alpha 1 was sequenced. This spectrum shows the presence of CML on residue 18 and hydroxylation of proline (OH) on residues 11 and 15. Labeled peaks show b- and y- series ions with + denoting charge.