To All: I have an antibody that was manufactured to be used for "clinical" sorting. The antibody is labeled with FITC. Since we have such a large amount of this reagent we have alliquoted it and froze it in many vials. Question?? How do I test this antibdy for reactivity over time? It seems I need to test both for FITC binding and antibody/antigen binding as well. Should I use biologic controls or some bead control? The major problem is time. Controls used today usually expire in 6mo. to a year. How to overlap?? Any ideas?? Jim Houston
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