I have compared Mabtech ELISpot assay to ELISpot assays we run at our company on regular basis "head-to-head" using identical samples. Mabtech"s kits proved to be superior to our protocol, had significantly lower background and provided better and higher detection of spots.
These ELIIP plates (MAIPSWU10 from Millipore) are sterile Multiscreen-IP sterile plates without underdrain and are suitable for ELISpot assays.For optimal binding of capture antibody, it is recommended to pre-wet, i.e. activate, the PVDF membrane with ethanol.
For more information on ethanol treatment: visit our Plate coating guide. Or have a look at our video.
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Email:Send your order toorder@mabtech.com.
Customers from USA or Canada: Please send your order tomabtech.usa@mabtech.com.| Application: |
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| Documentation: | Datasheet/ProtocolSDS |
| Contents: |
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| Size: | 10 plates |
| Other formats: | Click to view allSupplementary products products |
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第一次:包被抗体浓度为:8ug/ml,4,2,1,0.5,0.25,0为A,B,C,D,E,F,G
血清稀释度为1:100
酶标抗体稀释度为:1:1000,1:5000,1:10000,1:25000为1,2,3,4
结果为:1234
A3.3440.7120.4900.238
B2.7570.5230.3450.176
C2.4280.4550.3100.172
D>4.51.7771.2150.439
E>4.51.3570.7890.424
F1.1090.2540.1720.110
G1.3660.3310.1970.069(空白)从结果可以判断包被抗体浓度1ug/ml最合适
第二次:包被抗体1ug/ml
血清稀释度为1:25,1:50,1:100,1:150,1:200,1:250,1:300,空白为A,B,C,D,E,F,G,H
酶标抗体稀释度为:1:1000,1:5000,1:10000,1:25000为1,2,3,4
结果为:1234
A2.9930.6390.3380.236
B3.0210.7220.3070.191
C2.3360.4960.3080.176
D2.2560.4640.3040.176
E2.0310.4160.2470.139
F1.8300.3360.2310.153
G1.5980.3320.2270.132
空白H0.1580.0780.0720.074
这样的话应该是血清稀释度1:50最合适,酶标抗体稀释度1:1000最合适,但是这样的话OD值为3.021,是不是太大了?OD值是不是在1左右比较好呢?应该选择哪个浓度,哪个稀释度来做正式试验呢?
1. 直接法测定抗原 2.间接法测定抗体 3.双抗体夹心法测定抗原4. 竞争法测定抗原 厚百生物专业提供各类生化实验试剂、仪器、耗材,提供技术服务,满足您的实验室常规采购需求。厚百,让您更省心!
后采用豆粉浸提12000g离心取上清的方式,发现10的5、6、7、8次方稀释度所测OD值随着稀释度的升高而增大,比如一个样品的OD值5次方为0.2558次方为0.349;
刚接触相关知识,试验任务较重,心中疑问较大,恳请各位高手及时指正,诚谢!
1. 包被:用0.05M PH9,碳酸盐包被缓冲液将抗体稀释至蛋白质含量为1~10μg/ml,在每个聚苯乙烯板的反应孔中加0.1ml,4℃过夜。次日,弃去孔内溶液,用洗涤缓冲液洗3次,每次3分钟。
2. 加样:加一定稀释的待检样品0.1ml于上述已包被之反应孔中,置37℃孵育1小时。然后洗涤。(同时做空白孔,阴性对照孔及阳性对照孔)。
3. 加酶标抗体:于各反应孔中,加入新鲜稀释的酶标抗体(经滴定后的稀释度)0.1ml,37℃孵育0.5~1小时,洗涤。
4. 加底物液显色:于各反应孔中加入临时配制的TMB底物溶液0.1ml,37℃10~30分钟。
5. 终止反应:于各反应孔中加入2M硫酸0.05ml。
6. 结果判定:可于白色背景上,直接用肉眼观察结果:反应孔内颜色越深,阳性程度越强,阴性反应为无色或极浅,依据所呈颜色的深浅,以“+”、“-”号表示。也可测OD值:在ELISA检测仪上,于450nm(若以ABTS显色,则410nm)处,以空白对照孔调零后测各孔OD值,若大于规定的阴性对照OD值的2.1倍,即为阳性。
方法二:用于检测未知抗体的间接法:
用包被缓冲液将已知抗原稀释至1~10μg/ml,每孔加0.1ml,4℃过夜。次日洗涤3次。加一定稀释的待检样品(未知抗体)0.1ml于上述已包被之反应孔中,置37℃孵育1小时,洗涤。(同时做空白、阴性及阳性孔对照)于反应孔中,加入新鲜稀释的酶标第二抗体(抗抗体)0.1ml,37℃孵育30~60分钟,洗涤,最后一遍用DDW洗涤。其余步骤同“双抗体夹心法”的4、5、6。
下图为ELISA原理图,夹心法即Sandwich ELISA,竞争法就是Competitive ELISA
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