Components
1.2 Pre-coated plates, mAb MT49A7.
2.Vial(yellow top):Biotinylated detection mAb MT51B8(30μL);Concentration 0.5mg/ml.
3.Vial 2(white top):Streptavidin-ALP(4μL).
4.BCIP/NBT-plus substrate(25ml):The detection antibody is supplied in sterile filtered(0.2μm)PBS with 0.02% sodium azide. Streptavidin-ALP is supplied in 0.1M Tris buffer with 0.002% Kathon CG. Vials have been overfilled to ensure recovery of the specified amount.
Assay Procedure
1.Remove the plate from the sealed package and wash 4 times with sterile PBS(200 ul/well).
2.Condition the plate with medium (200 ul/well) containing 10% of the same serum as used for the cell suspensions. Incubate for at least 30 minutes at room temperature.
3.Remove the medium and add the stimuli followed by the cell suspension. Alternatively cellsand stimuli can be mixed before addition to the plate.
4.Put the plate in a 37°Chumidified incubator with 5% CO, and incubate for 12-48 hours. Do not move the plate during this time and take measures to avoid evaporation.
5.Remove the cells by emptying the plate and wash 5 times with PBS, 200 ul/well.
6.Dilute the detection antibody(MT51B8-biotin) to 0.05 ug/ml in PBS containing 0.5% fetal calfserum(PBS-O.5%FCS).Add 100 ul/well and incubate for 2 hours at room temperature.
7.Wash plate as above (step C1).
8.Dilute the Streptavidin-ALP(1:1000) in PBS-0.5% FCS and add 100 ul/well. Incubate for 1 hour at room temperature.
9.Wash plate as above (step C1).
10.Filter the ready-to-use substrate solution(BCIP/NBT-plus) through a 0.45 um filter and add100 ul/well. Develop until distinct spots emerge.
11.Stop color development by washing extensively in tap water. If desirable, remove the underd-rain (the soft plastic under the plate) and rinse the underside of the membrane.
12.Leave the plate to dry.Inspect and count spots in an ELISpot reader or in a dissection micro-scope.
13.Store plate in the dark at room temperature.
Format
Biotinylated detection mAb (MT51B8),Streptavidin-ALP,Substrate (BCIP/NBT-plus),Pre-coated MSIP white plates (mAb MT49A7)
Precaution of Use
We recommend the use of PVDF-based membrane plates. Maximal antibody binding capacity of these platesis obtained by a brief treatment with ethanol.
Handling Advice
PBS for washing and dilution should be filtered (0.3 um) for optimal results.Although possible to use, we donot recommend the inclusion of Tween or other detergents in the washing and incubation buffers.
Storage Comment
Plates should be kept at room temperature.
Expiry Date
The expiry date indicates how long unopened products, stored according to instructions, are recommended for use.
Note
The serum should be selected to support cell culture and give low background staining. We recom-mend the use of fetal calf serum. Alternatively serum-free medium evaluated for cell culture can beused.
Restrictions
For Research Use Only. Not for use in diagnostic procedures.