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- W2998569228 abstract "The silkworm, Bombyx mori, is a promising expression system for the production of recombinant proteins, but the purification of these proteins is not easy because of the large amount of host proteins present. To investigate purity, recovery and scale-up ability of the purification of recombinant proteins expressed in silkworm larval hemolymph without any affinity tags, we used mCherry, a red fluorescence protein, as a model. The host cell proteins could be greatly reduced using a three-step chromatography protocol consisting of hydrophobic interaction chromatography (HIC), size exclusion chromatography (SEC) and heparin chromatography after heat pretreatment. The thermal treatment had the greatest impact on the removal of host cell extracellular proteins and increasing purity. There were still some minor traces of host cell proteins in the purified sample, which showed that the purification of recombinant proteins from the silkworm hemolymph was still challenging. The proposed protocol and affinity tag purification reduced the overall protein content by 99.84% and 99.95%, respectively, while the amount of DNA was reduced by 98.41% and 99.53%, respectively. Purities of our proposed protocol based on SDS-PAGE and capillary electrophoresis (CE) analyses were 85.45% and 43.60%, respectively, while those of Strep-tag affinity purification were 100% or 63.69%, respectively. Using densitometry, the overall recovery was calculated was 5.78%, which was higher than 4.09% using Strep-tag affinity purification. This proposed protocol, mainly based on thermal treatment, HIC, SEC and HiTrap Heparin HP column chromatography, is applicable to an upscalable purification for the silkworm expression system without employing affinity tag chromatography process." @default.
- W2998569228 created "2020-01-10" @default.
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- W2998569228 date "2020-02-01" @default.
- W2998569228 modified "2023-10-15" @default.
- W2998569228 title "A systematic and methodical approach for the efficient purification of recombinant protein from silkworm larval hemolymph" @default.
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- W2998569228 doi "https://doi.org/10.1016/j.jchromb.2019.121964" @default.
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