2.2.7. Protein analysis
The concentration of protein was determined by Lowry’s
method, (Lowry et al., 1951; Wilson and Walker, 2000). Using
a set of nine test tubes blank (A), standard casein solution (B–
F) and the sample (G–I) add 3 ml of Reagent C {(Reagent
C = 100 parts of Reagent A + 1 part of Reagent B). Reagent
A = 2% Na2
CO3
+ 0.4 NaOH + 0.16% sodium potassium
tartarate + 1% sodium dodecyl sulfate (SDS). Reagent
B = (4% CuSO4Æ5H2
O make up to ml)} and 0.3 ml of Folin–Ciocalteu Reagent, let it stand for 45 min, read absorbance
at 660 nm (use tube as blank), and plot the standard curve.
2.2.7. Protein analysis
The concentration of protein was determined by Lowry’s
method, (Lowry et al., 1951; Wilson and Walker, 2000). Using
a set of nine test tubes blank (A), standard casein solution (B–
F) and the sample (G–I) add 3 ml of Reagent C {(Reagent
C = 100 parts of Reagent A + 1 part of Reagent B). Reagent
A = 2% Na2
CO3
+ 0.4 NaOH + 0.16% sodium potassium
tartarate + 1% sodium dodecyl sulfate (SDS). Reagent
B = (4% CuSO4Æ5H2
O make up to ml)} and 0.3 ml of Folin–Ciocalteu Reagent, let it stand for 45 min, read absorbance
at 660 nm (use tube as blank), and plot the standard curve.
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