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We describe here a new type of solid support for the ELISPOT assay, the PVDF membrane. In parallel tests, spot yields on this membrane were superior to those obtained with the frequently used nitrocellulose (NC) membrane, coated with the same rat anti-IgM and anti-IgG antibodies, incubated with the same rat spleen cell suspensions, and developed with the same combination of AP-labeled conjugates...
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