Rigor Bonds Reduce Lattice Spacing of Skinned Porcine Skeletal Muscle Fibre Under Pse-Like Conditions

J. Liu; A. Arner

Rigor Bonds Reduce Lattice Spacing of Skinned Porcine Skeletal Muscle Fibre Under Pse-Like Conditions

In: 63rd International Congress of Meat Science and Technology

Authors:

J. Liu

J. Liu Department of Physiology and Pharmacology, Karolinska Institutet, v Eulers v 8, 171 77, Stockholm, Sweden; jiao.liu@ki.se

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A. Arner

A. Arner Department of Physiology and Pharmacology, Karolinska Institutet, v Eulers v 8, 171 77, Stockholm, Sweden; jiao.liu@ki.se

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Type:: Chapter

Pages:: 858–859

DOI:: https://doi.org/10.3920/9789086868605_384

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We established a new model on permeabilised/skinned porcine muscle fibres to study the effects of varied pH, temperature and the presence of rigor bonds on the myofibrillar protein denaturation during PSE-like conditions. Two parameters were evaluated: (1) the isometric contraction force of the contractile machinery; and (2) myofilament lattice spacing. Our data showed that rigor bond attachment for 30 min at 38 °C, pH 5.5 reduced the lattice spacing by 20%, accompanied by 50% loss of active contraction force while relaxed fibres had unchanged lattice spacing and force. The present study suggests that rigor bond attachment during PSE-like conditions would diminish water-holding due to more severe myofibrillar protein denaturation affecting the filament spacing.

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63rd International Congress of Meat Science and Technology

Nurturing locally, growing globally

E-Book ISBN:: 9789086868605

Publisher:: Wageningen Academic

Print Publication Date:: 15 Nov 2017

Subjects
- Life Sciences

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Rigor Bonds Reduce Lattice Spacing of Skinned Porcine Skeletal Muscle Fibre Under Pse-Like Conditions

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63rd International Congress of Meat Science and Technology

Nurturing locally, growing globally

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