Table 4 Reflective density of myofibrillar proteins in infraspinatus (IS) and gluteus medius (GM) muscles in goats during postmortem chill storage

Fast MHC¹ (density/mm²)

IS

26.54 ± 0.120^ax

23.00 ± 0.209^bx

20.49 ± 0.231^cx

0.004

0.091

GM

94.33 ± 0.100^ay

88.44 ± 0.707^by

81.20 ± 0.309^cy

0.023

P value

0.001

0.002

0.001

% loss of fast MHC

IS

13.33 ± 0.900^by

22.61 ± 2.110^ay

0.009

0.09

GM

6.24 ± 0.001^bx

13.91 ± 0.148^ax

0.012

P value

0.021

0.033

Slow MHC¹ (density/mm²)

IS

100.01 ± 4.011^ay

85.00 ± 2.991^by

63.44 ± 3.311^cy

0.001

0.102

GM

24.10 ± 0.122^ax

20.30 ± 2.00^bx

17.00 ± 2.121^cx

0.001

P value

0.009

0.011

0.001

% loss of slow MHC

IS

15.00 ± 0.020^b

36.56 ± 2.067^ay

0.032

0.110

GM

15.76 ± 0.341^b

29.16 ± 2.019^ax

0.016

P value

0.130

0.002

Actin (density/mm²)

IS

13.76 ± 0.400^x

13.50 ± 1.207^x

13.40 ± 0.610^x

0.100

0.102

GM

21.00 ± 0.211^y

20.69 ± 0.144^y

20.50 ± 0.201^y

0.120

P value

0.009

0.021

0.018

% loss of actin

IS

1.16 ± 0.001

2.61 ± 0.863

0.091

0.087

GM

1.47 ± 0.001

2.38 ± 0.152

0.070

P value

0.114

0.185