کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5133508 | 1492066 | 2017 | 4 صفحه PDF | دانلود رایگان |
- Ferromagnetic particles of azocasein composite (mAzo) were synthesized.
- Crude extract from intestines of fish Nile tilapia (Oreochromis niloticus) was exposed mAzo, washed to remove unbound proteins by magnetic field and trypsin was leached off under high ionic strength.
- Preparation was achieved containing specific activity about 60 times higher than that of the crude extract.
- SDS-PAGE showed protein with molecular weight (24Â kDa) similar to reported Nile tilapia trypsin.
- mAzo can be reused and applied to purify trypsin from other sources.
This work presents an inexpensive, simple and fast procedure to purify trypsin based on affinity binding with ferromagnetic particles of azocasein composite (mAzo). Crude extract was obtained from intestines of fish Nile tilapia (Oreochromis niloticus) homogenized in buffer (01Â g tissue/ml). This extract was exposed to 100Â mg of mAzo and washed to remove unbound proteins by magnetic field. Trypsin was leached off under high ionic strength (3Â M NaCl). Preparation was achieved containing specific activity about 60 times higher than that of the crude extract. SDS-PAGE showed that the purified protein had molecular weight (24Â kDa) in concordance with the literature for the Nile tilapia trypsin. The mAzo composite can be reused and applied to purify trypsin from other sources.
Journal: Food Chemistry - Volume 226, 1 July 2017, Pages 75-78