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identifier: 1604158
description:
epitope description:VNSTEAETI
antigen name:Coagulation factor IX
host organism:Homo sapiens
aggregation:
instance of dataset
availability:
available
primaryPublications: 9786161
authorizations:
registration not required
accessURL: http://www.iedb.org/reference/1013990
landingPage: http://www.iedb.org/assay/1604158
type:
Literature
publicationVenue:
Peptides
dates:
1998
study type: b cell assays
subject species: Homo sapiens
fullName:
I Takahashi
F Yako
H Saito
method:
antigen inhibition
name:
Change of antigenic and neutralizing specificity in substitutional epitope peptides of hemophilia B inhibitor.
description:
Neutralization of inhibitor in patient plasma by the epitope was measured. Inhibition of factor IX activity was determined by an activated partial thromboplastin assay using severe hemophilia B plasma as substrate. The epitope was previously shown to neutralize inhibition by patient plasma only at very high concentrations (10mM). Single amino acid substitutions of the epitope decreased the concentration of the peptide needed. One patients’ plasma was neutralized by the substitution peptide A6D (14.5%; 0.5 mM), A6E (9.5%; 0.5 mM), or A6Y (13.3%; 0.5 mM).

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