We are interested in using beads to measure antibody titers, as outlined in recent papers in JIM and Cytometry. I was curious if anyone knew of sources for beads and what comments you have on those sources. So far we have tried Molecular Probes 1 micron red beads and Polysciences 2 micron unlabeled beads. The beads from Molecular Probes are pretty much a uniform population with very little in the way of variance in forward or side scatter. The Polysciences beads, on the other hand... Ultimately we would like to be able to assay antibody responses to two or more antigens at the same time, so it is crucial for our work that we be able to easily distinguish the beads from one another. We can use beads of different colors, but also would like to be able to use beads of different size as well. -Doug Reed Douglas S. Reed, Ph.D. Microbiologist Department of Aerobiology and Product Evaluation Division of Toxinology and Aerobiology U.S. Army Medical Research Institute of Infectious Disease 1425 Porter St. Ft. Detrick Frederick, MD 21702-5011 301-619-6728 301-619-2541 fax Doug.Reed@det.amedd.army.mil
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