Structure-function specialisation of the interfascicular matrix in the human achilles tendon.

There was a trend towards a lower elastin content in the old Achilles compared to the old anterior tibial tendon, but this did not reach statistical significance (p=0.07). 3.5 Protein identification and ontology Overall, more proteins were identified in the IFM than in fascicles, and a greater proportion of those identified in fascicles were classified as ECM or ECM-related proteins ( Table 1 ). 3.5.1 Differences in protein abundance between tendon types and age groups More proteins were identified as differentially abundant in the IFM than in fascicles, with most changes occurring in the old Achilles ( Fig. 4 & 5).

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