Table 1. Recent studies evaluating effects of irradiation on meat proteins

Sample type Source of radiation Radiation dose Effects Reference
Myofibrillar protein and sarcoplasmic protein Gamma ray 3, 5, and 7 kGy - Total sulfhydryl group and free thiol groups decreased with increasing dose in both proteins.- Surface charge of myofibrillar protein increased when irradiated with 3 and 5 kGy.- Surface charge of sarcoplasmic protein decreased with increasing dose. Li et al. (2018a)
Myofibrillar protein and sarcoplasmic protein Gamma ray 3, 5, and 7 kGy - Disulfide bonds in both proteins were decreased with increasing dose in both proteins.- Myofibrillar protein solubility increased with increasing dose.- Sarcoplasmic protein solubility decreased after irradiation. Li et al. (2018b)
M. biceps femoris muscles from porcine Gamma ray 3, 5, and 7 kGy - Myosin and collagen were degraded by irradiation, which increase tenderness in a dose-dependent manner. Zhang et al. (2020)
Tegillarca granosa meat Electron beam 1, 3, 5, 7, and 9 kGy - Actin, paramyosin, and myosin heavy chain (MHC) were degraded by irradiation.- α-Helix content of myofbrillar protein decreased and β-sheet content of myofbrillar protein increased by irradiation.- Irradiation of 5 kGy or above induced significant decrease in total sulfhydryl content and Ca2+-ATPase activity of myofibrillar protein. Lv et al. (2018)
Myofibrillar protein from grass carps Gamma ray 2, 4, 6, 8, and 10 kGy - Emulsifying activity and stability decreased with increasing dose.- Surface hydrophobicity increased by irradiation.- Total sulfhydryl group and free thiol group decreased with increasing dose.- MHC was degraded by irradiation. Shi et al. (2015)
Myofibrillar protein from chicken Gamma ray 3, 7, and 10 kGy - Myofibrillar protein solubility decreased by irradiation to the significantly identical level, regardless of radiation dose. Choi et al. (2015)
M. biceps femoris of lamb and buffalo and M. pectoralis major of chicken Gamma ray 2.5, 5, and 10 kGy - Myofibrillar protein solubility, sarcoplasmic protein solubility, and collagen solubility of muscles increased with increasing dose.- CIE a* of muscles increased by irradiation. Kanatt et al. (2015)
M. biceps femoris, M. semitendinosus, and M. semimembranosus from porcine Gamma ray, electron beam, X-ray 5 kGy - CIE a* was decreased by all radiation.- Myofibrillar protein solubility and sarcoplasmic protein solubility were decreased by irradiation. Kim et al. (2017)
Pork ham Gamma ray, electron beam, X-ray 10 kGy - CIE a* of raw meat emulsion irradiated X-ray was increased.- Myofibrillar protein solubility was increased and sarcoplasmic protein solubility was decreased by irradiation. Kim et al. (2020)
Duck breast Electron beam 3 and 7 kGy - Metmyoglobin content was increased, and oxymyoglobin content and CIE a* of duck breast meat were decreased by irradiation of 7 kGy electron beam. Arshad et al. (2020)
M. semimembranosus from bovine Electron beam and X-ray 5 kGy - CIE a* was decreased by irradiation.- Sarcoplasmic protein pattern did not change in SDS-PAGE. Kim et al. (2018)
M. longissimus lumborum from Nellore bovine Gamma ray 3, 6, and 9 kGy - Soluble collagen content was increased by irradiation.- Metmylglobin content was increased by irradiation with increasing dose. Rodrigues et al. (2020)
SDS-PAGE, sodium dodecyl sulfate–polyacrylamide gel electrophoresis.