教程:Bradford法用标准曲线测定蛋白浓度
本教程对应“Easy Regression”
1. reagents:
Bradford stain(考马斯亮蓝G250染液配方):
- Coomassie brilliant blue G250: 100mg
- 95% ethanol: 50ml
- phosphate acid: 100ml
- add water to 1000ml
BSA: 1ug/ul
2. procedures:
- 在96孔板中加入试剂,如下表所示:
standard protein concentration(ug/ul)
repeate well 1
repeate well 2
repeate well 3
0 200+10+0 200+10+0 200+10+0 0.2 200+8+2 200+8+2 200+8+2 0.4 200+6+4 200+6+4 200+6+4 0.6 200+4+6 200+4+6 200+4+6 0.8 200+2+8 200+2+8 200+2+8 1.0 200+0+10 200+0+10 200+0+10 sample1 200+10(s) 200+10(s) 200+10(s) sample2 200+10(s) 200+10(s) 200+10(s) - 在96孔板各个孔中加入200ul Bradford 染液
- 然后在各个复孔中加入10,8,6,4,2,0ul的PBS或者水
- 然后对应孔中分别加入 0ul, 2ul, 4ul, 6ul, 8ul, 10ul of BSA
- 反应 5min, 在多功能读板机(e.g.Molecular Device M5)或者酶标仪上读取 OD595 值, 按下面的方式将数据拷贝到“Easy Regression”页面中
- (注意,一行代表一个浓度,不同复孔的读数)
for starndards:
0.6112 0.6003 0.6024
0.7354 0.7645 0.7325
0.8501 0.8845 0.8934
1.0027 1.0164 1.0116
1.1265 1.1089 1.13
1.181 1.1962 1.212
for samples:
1.0572 1.0381 1.0169
0.9473 0.9473 0.9473
open the protein concentration app page: >>tools> easy concentration,
paste the stardard and sample OD value,then submit, the concentration will be calculated.