cross-reacting material


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cross-re·act·ing ma·te·ri·al (CRM),

a substance sufficiently different from a reference substance (R) to have a perceptibly different function from R, but similar enough to react with anti-R antibodies.
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Since the cross-reacting material is PorA, it is present in sufficient quantity in bacterial sonicates used in the direct ELISA for all strains to be positive.
Cross-reactivity of outer membrane proteins of Campylobacter species with cholera toxin

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