Liha töötlemine
2008). Because p94 is active even in the
2008). From this finding it was postulated absence of Ca2+ (Sorimachi and Suzuki
that chicken muscle tenderizes more rapidly 2001), it is thought to have a role in the regu-
than beef due to greater activation of the lation of μ- and m-calpain activity or be a
calpain system (Lee et al. 2008). negative regulator of apoptosis (Goll et al.
Ubiquitous μ- and m-calpains are het- 2003).
erodimers that dissociate in the presence of Less than 10% of total calpain is normally
Ca2+ into a regulatory 28 kDa subunit that is activated in the skeletal muscle (Goll et al.
identical in both isoforms (Carafoli and 2003). Research has demonstrated that the
Molinari 1998) and into a large catalytic optimal condition for calpain activity is pH
subunit (∼80 KDa). It is the catalytic subunit 7.5 at 25°C (Zeece et al. 1986), but activity
(Dutt et al
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