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. Author manuscript; available in PMC: 2010 Oct 14.
Published in final edited form as: J Orthop Res. 2007 Sep;25(9):1128–1135. doi: 10.1002/jor.20400

Figure 4.

Figure 4

HPLC-MS results of a synovial fluid sample from the early OA group after thorough protein digestion. Note the HPLC analyte at 13.12 m that correlates with a Cl-peptide (A) and the appearance of a singly charged signal with an isotopic distribution consistent with the presence of Cl at m/z 809.6 (B).