Page 3
2.5.2. SDS-polyacrylamide gel electrophoresis (SDS-PAGE)
SDSePAGE was performed by the method of Laemmli (1970).
Gel samples were dissolved in 50 g L
À1
SDS solution. The mixtures
were then heated at 85
C for 1 h using a temperature controlled
water bath model W350 (Memmert, Schwabach, Germany). The
mixtures were centrifuged at 8500 g for 5 min using a micro-
centrifuge (MIKRO20, Hettich Zentrifugan,170 Germany) to remove
undissolved debris. Solubilized samples were mixed at 1:1 (v/v)
ratio with the sample buffer (0.5 mol L
À1
TriseHCl, pH 6.8 con-
taining 5 g 100 mL
À1
SDS and 200 mL L
À1
glycerol). Samples (15
m
g
protein) were loaded onto a polyacrylamide gel made of 75 g L
À1
separating gel and 40 g L
À1
stacking gel and subjected to electro-
phoresis at a constant current of 20 mA gel
À1
. After electrophoresis,
the gels were stained with 0.5 mL L
À1
(w/v) Coomassie Blue R-250
in 150 mL L
À1
methanol and 50 mL L
À1
acetic acid for 30 min.
Finally, they were destained with a mixture of 300 mL L
À1
methanol
and 100 mL L
À1
acetic acid for 1 h and destained again with the
same solution for 30 min. High-molecular-weight protein markers
were used to estimate the molecular weight of proteins.
หน้า 3 Page 3
2.5.2 ข่าวคราว SDS-อะคริเลต (SDS-PAGE) 2.5.2. SDS-polyacrylamide gel electrophoresis (SDS-PAGE)
SDSePAGE ได้ดำเนินการโดยวิธีการ Laemmli (1970). SDSePAGE was performed by the method of Laemmli (1970).
ตัวอย่างเจลถูกกลืนหายไปใน 50 กรัม L Gel samples were dissolved in 50 g L
A1 À1
แก้ปัญหา SDS SDS solution. The mixtures
were then heated at 85
C for 1 h using a temperature controlled
water bath model W350 (Memmert, Schwabach, Germany). The
mixtures were centrifuged at 8500 g for 5 min using a micro-
centrifuge (MIKRO20, Hettich Zentrifugan,170 Germany) to remove
undissolved debris. Solubilized samples were mixed at 1:1 (v/v)
ratio with the sample buffer (0.5 mol L
À1
TriseHCl, pH 6.8 con-
taining 5 g 100 mL
À1
SDS and 200 mL L
À1
glycerol). Samples (15
m
g
protein) were loaded onto a polyacrylamide gel made of 75 g L
À1
separating gel and 40 g L
À1
stacking gel and subjected to electro-
phoresis at a constant current of 20 mA gel
À1
. After electrophoresis,
the gels were stained with 0.5 mL L
À1
(w/v) Coomassie Blue R-250
in 150 mL L
À1
methanol and 50 mL L
À1
acetic acid for 30 min.
Finally, they were destained with a mixture of 300 mL L
À1
methanol
and 100 mL L
À1
acetic acid for 1 h and destained again with the
same solution for 30 min. High-molecular-weight protein markers
were used to estimate the molecular weight of proteins.
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