Anti-trinitrophenyl (TNP) antibody detection by neutralization of TNP-coliphage T4

P. Barber, M. B. Rittenberg

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Anti-trinitrophenyl antibodies are detected by the specific neutralization of bacteriophage T4 haptenated with the picryl radical (TNP). TNP-phage neutralization by anti-TNP is compared to neutralization by anti-phage. Anti-TNP neutralized haptenated phage by two separable first order processes. The initial reaction was operative until the surviving fraction approached 0·1 at which point a second, slower, apparent first order process was detectable. Neutralization of haptenated phage by anti-phage antibody appeared to proceed by a single first order reaction and thus differed from neutralization by anti-TNP antibody. Neutralization by anti-TNP is hapten specific since anti-hapten antibody was unable to neutralize native phage and since neutralization of TNP-phage by anti-TNP was inhibited by TNP-ε{lunate}-aminocaproic acid which does not affect anti-phage antibodies. Neutralization of TNP-phage by anti-hapten also differs from neutralization of TNP-phage in the rat the former is more dependent on antigen concentration. This assay was used to detect primary 19S and 7S anti-hapten antibodies separated by sucrose gradient centrifugation and provides a means of detecting the two classes of anti-TNP antibodies at very low concentration.

Original languageEnglish (US)
Pages (from-to)163-174
Number of pages12
Issue number2
StatePublished - Mar 1969

ASJC Scopus subject areas

  • Medicine(all)


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