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Updated: Aug 8, 2026

Hepatitis E Virus Fluorescence Reduction Neutralization Test for Measuring Neutralizing Antibody Titers
Published on: May 22, 2026
A bicistronic subgenomic mRNA encodes both the ORF2 and ORF3 proteins of hepatitis E virus
Judith Graff1, Udana Torian, Hanh Nguyen
1Molecular Hepatitis Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-8009, USA. jgraff@niaid.nih.gov
Abstract:
Hepatitis E virus replicons containing the neomycin resistance gene expressed from open reading frames (ORFs) 2 and 3 were transfected into Huh-7 cells, and stable cell lines containing functional replicons were selected by constant exposure to G418 sulfate. Northern blot analyses detected full-length replicon RNA and a single subgenomic RNA. This subgenomic RNA, which was capped, initiated at nucleotide 5122 downstream of the first two methionine codons in ORF3 and was bicistronic; two closely spaced methionine codons in different reading frames were used for the initiation of ORF3 and ORF2 translation.
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