scholarly journals Effect of extended postmortem aging and steak location on myofibrillar protein degradation and Warner-Bratzler shear force of beef M. semitendinosus steaks1

2016 ◽  
Vol 94 (1) ◽  
pp. 412-423 ◽  
Author(s):  
K. J. Phelps ◽  
J. S. Drouillard ◽  
M. B. Silva ◽  
L. D. F. Miranda ◽  
S. M. Ebarb ◽  
...  
Keyword(s):  
Protein Degradation ◽  
Shear Force ◽  
Myofibrillar Protein ◽  
Postmortem Aging

Effects of extended postmortem aging and intramuscular location on protein degradation, muscle fiber morphometrics, and tenderness of beef longissimus lumborum and semitendinosus steaks

2021 ◽  
Author(s):  
MaryAnn J Matney ◽  
Morgan E Gravely ◽  
Travis G O’Quinn ◽  
James S Drouillard ◽  
Kelsey J Phelps-Ronningen ◽  
...  
Keyword(s):  
Protein Degradation ◽  
Muscle Fiber ◽  
Shear Force ◽  
The Other ◽  
Fiber Types ◽  
Cross Sectional ◽  
Extended Aging ◽  
Dependent Variables ◽  
Postmortem Aging ◽  
Longissimus Lumborum

Abstract The objective of this study was to determine effects of extended aging and intramuscular location on Warner-Bratzler shear force (WBSF), muscle fiber cross-sectional area (CSA), and protein degradation of semitendinosus (ST) and longissimus lumborum (LL) steaks. Left ST and LL were removed from 40 carcasses at 6 d postmortem. The ST was fabricated into 5 locations (LOC), with LOC 1 being most proximal and LOC 5 being most distal. The posterior LL was fabricated into 3 LOC, with LOC 1 being most anterior. Vacuum sealed ST steaks were aged 7, 14, 28, 56, or 112 d postmortem, while LL steaks were aged 7, 28, or 112 d postmortem at 2 ± 1°C. A steak from each LOC was assigned to WBSF or laboratory analyses. There were no Day of Aging (DOA) × LOC interactions for all dependent variables (P > 0.06). There were DOA effects for ST and LL WBSF values and degraded 38-kDa desmin (DES; P < 0.01). Day-7 ST-steak WBSF value was greater than all other days (P < 0.01) and d-14 steaks had greater WBSF value than remaining days (P < 0.05). Day-28 ST-steak WBSF values were greater than d-56 and -112 (P < 0.01), which did not differ (P = 0.53). In the LL, d-7 steaks had greater WBSF values than the other two timepoints (P < 0.01) and d-28 steaks had greater (P < 0.01) WBSF values than d-112 steaks. Degraded ST 38-kDa DES content was less on d 7 and 14 compared to all other days (P < 0.03), but did not differ (P = 0.79) from each other. Days 28 and 56 38-kDa DES content was less than d 112 (P < 0.01), but did not differ (P = 0.34) from each other. Degraded LL 38-kDa DES content was less on d 7 than d 28 and 112 (P < 0.02), which did not differ (P = 0.67). There were LOC effects for only ST WBSF and muscle fiber CSA (P < 0.05). Semitendinosus steak LOC 1 and 2 had greater WBSF values than all other locations (P < 0.01), but did not differ (P = 0.32) from each other. Semitendinosus steak LOC 3 and 5 had greater WBSF values than LOC 4 (P < 0.01), but did not differ (P = 0.85) from each other. The CSA of all ST fiber types were largest in LOC 1 compared to all other fiber types (P < 0.01). The CSA of all LOC 2 and 3 fiber types was greater than LOC 4 and 5 (P < 0.01), but were not different from each other (P > 0.81), and LOC 4 had greater CSA than LOC 5 (P < 0.01). Steak aging WBSF value improvements seemed proteolysis catalyzed, while the ST intramuscular tenderness gradient was more likely due to muscle fiber CSA.

Myofibrillar protein degradation and muscle proteinases in normal and diabetic rats

1979 ◽  
Vol 21 (1) ◽  
pp. 33-39 ◽  
Author(s):  
B. Dahlmann ◽  
C. Schroeter ◽  
L. Herbertz ◽  
H. Reinauer
Keyword(s):  
Protein Degradation ◽  
Diabetic Rats ◽  
Myofibrillar Protein

Effects of µ‐calpain oxidation on Coregonus peled myofibrillar protein degradation in vitro

2020 ◽  
Vol 85 (3) ◽  
pp. 682-688 ◽  
Author(s):  
Junwei Qin ◽  
Xiaorong Deng ◽  
Yongdong Lei ◽  
Pingping Liu ◽  
Shiling Lu ◽  
...  
Keyword(s):  
Protein Degradation ◽  
Myofibrillar Protein

scholarly journals Effects of zilpaterol hydrochloride feeding duration and postmortem aging on Warner-Bratzler shear force of three muscles from beef steers and heifers

2009 ◽  
Vol 87 (11) ◽  
pp. 3764-3769 ◽  
Author(s):  
J. C. Brooks ◽  
H. C. Claus ◽  
M. E. Dikeman ◽  
J. Shook ◽  
G. G. Hilton ◽  
...  
Keyword(s):  
Shear Force ◽  
Beef Steers ◽  
Feeding Duration ◽  
Zilpaterol Hydrochloride ◽  
Postmortem Aging

Proteasome production in human muscle during nutritional inhibition of myofibrillar protein degradation

Metabolism ◽  
2004 ◽  
Vol 53 (3) ◽  
pp. 340-347 ◽  
Author(s):  
Irwin G Brodsky ◽  
Dennis Suzara ◽  
Mikhail Furman ◽  
Paul Goldspink ◽  
G.Charles Ford ◽  
...  
Keyword(s):  
Protein Degradation ◽  
Myofibrillar Protein ◽  
Human Muscle
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