Freeze-dried FMS and various types of fermented sauces were dissolved in ultrapure water at a concentration of 1% (w/w), and 25 ll of each fermented sauce, freeze-dried FMS, or Gln-Tyr-Pro solutions at different concentrations were mixed with 175 llof BSA solution and incubated at room temperature for 30 min. SDS–PAGE was then performed in which 25 ll of saline and 25 ll of OH-radical solution were mixed and further incubated at 37 C for 60 min. This reaction mixture (50 ll) was then added to an equal volume of a sample buffer solution (1.0 ml of b-mercaptoethanol, 5.0 ml of 0.25 M Tris–HCl buffer (pH 6.8), and 0.4 g of SDS), which was then made up to 10 ml with ultrapure water, followed by addition of 10 ll of 70% glycerin. This sample was applied to a 12.5% gradient SDS–PAGE gel and electrophoresed at 40 mA for 90 min. After electrophoresis, the gel was stained and scanned. The concentrations of BSA bands were determined using the densitometric analysis mode of Chemidox XRS. The degrada-tion inhibitory effects of BSA by FMS, various types of fermented sauce, and Gln-Tyr-Pro addition were calculated using the follow-ing equation:
Antioxidant activity against the OH-radical (degradation inhibitory effect) (%) = concentration of BSA band (mg/ml)/0.57 (mg/ml) 100. A negative control mixture was prepared by mixing 175 ll BSA solution, 25 ll of saline and 25 ll of OH-radical solution. The absence of a negative control BSA band was confirmed in every assay.
Freeze-dried FMS and various types of fermented sauces were dissolved in ultrapure water at a concentration of 1% (w/w), and 25 ll of each fermented sauce, freeze-dried FMS, or Gln-Tyr-Pro solutions at different concentrations were mixed with 175 llof BSA solution and incubated at room temperature for 30 min. SDS–PAGE was then performed in which 25 ll of saline and 25 ll of OH-radical solution were mixed and further incubated at 37 C for 60 min. This reaction mixture (50 ll) was then added to an equal volume of a sample buffer solution (1.0 ml of b-mercaptoethanol, 5.0 ml of 0.25 M Tris–HCl buffer (pH 6.8), and 0.4 g of SDS), which was then made up to 10 ml with ultrapure water, followed by addition of 10 ll of 70% glycerin. This sample was applied to a 12.5% gradient SDS–PAGE gel and electrophoresed at 40 mA for 90 min. After electrophoresis, the gel was stained and scanned. The concentrations of BSA bands were determined using the densitometric analysis mode of Chemidox XRS. The degrada-tion inhibitory effects of BSA by FMS, various types of fermented sauce, and Gln-Tyr-Pro addition were calculated using the follow-ing equation: Antioxidant activity against the OH-radical (degradation inhibitory effect) (%) = concentration of BSA band (mg/ml)/0.57 (mg/ml) 100. A negative control mixture was prepared by mixing 175 ll BSA solution, 25 ll of saline and 25 ll of OH-radical solution. The absence of a negative control BSA band was confirmed in every assay.
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