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loss of troponin-T, as has been reported in to fragmentation of the myofibril and overall
numerous studies (Olson et al. 1977; muscle integrity. During postmortem aging,
Koohmaraie et al. 1984a, b; Ho et al. 1994). the myofibrils in postmortem bovine muscle
It has recently been shown that troponin-T is are broken in the I-band region (Taylor et al.
cleaved in its glutamic acid-rich amino-ter- 1995). Because troponin-T is part of the reg-
minal region (Muroya et al. 2007). Some ulatory complex that mediates actin-myosin
studies have shown labeling of two very interactions (Greaser and Gergely, 1971;
closely spaced bands corresponding to intact Hitchcock, 1975; McKay et al. 1997; Lehman
troponin-T. This is likely due to isoforms of et al. 2001), it is also conceivable that its
troponin-T that are known to exist in skeletal postmortem degradation may lead to changes
muscle (Briggs et al
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