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Zhi-Feng Zhou,Zi-Xu Ren,Hai-Yan Yu,Jun-Qiang Jia,Zhong-Zheng Gui 한국응용곤충학회 2017 Journal of Asia-Pacific Entomology Vol.20 No.1
To improve the properties of silkworm (Bombyx mori) pupa protein (SPP), the effects of different modification techniques included enzymolysis, ultrasound, and micronization on the molecular structure and bioactivity of SPP has been evaluated in this study. The results showed that enzymolysis modification led to the most substantial change in the area and shape of the infrared (IR) absorption peaks, decreased in size with an increased number of cracks of modified protein by scanning electron microscopy images, followed by ultrasound and micronization modification. After modification by enzymolysis, ultrasound, and micronization, the sulfhydryl concentrations of SPPwere increased by 48.56%, 34.82%, and 12.46%, respectively; disulfide bond concentrations were reduced by 40.47%, 10.79%, and 11.72%, respectively. Furthermore, the ratios of essential amino acids among total amino acids increased by 13.85%, 2.22%, and 6.93%, respectively. Antioxidant activity and ACE-inhibitory activity of SPP also increased notably after modifications.
Ru-Jian Ma,Chun-Yan Wang,Yan-Wei Liu,Thasma Raman Sivakumar,Zi-Xu Ren,Ying Fang,Jun-Qiang Jia,Zhong-Zheng Gui 한국응용곤충학회 2014 Journal of Asia-Pacific Entomology Vol.17 No.1
While screening for cellulase-producing fungi from insect gut, a fungus with high endoglucanase (carboxymethylcellulase; CMCase) activitywas isolated fromthe larval gut of Bombyx mori. Based onmorphological characteristicsand using an 18S rRNA-based molecular phylogenetic approach, the fungus, strain BMC-2, was identified as aMucor sp. expressing a novel alkalotolerant cellulase. The maximum production of cellulase by the BMC-2 strainwas observed at 55°C and pH8.0. The CMCase activity was inhibited by Cu2+ N Na+ N Zn2+ N Mg2+ N Ba2+, andinduced by Ca2+, Mn2+, Fe2+, and K+.