Related Experiment Video

Updated: Aug 4, 2026

Development of a Hepatitis B Virus Reporter System to Monitor the Early Stages of the Replication Cycle
09:35

Development of a Hepatitis B Virus Reporter System to Monitor the Early Stages of the Replication Cycle

Published on: February 1, 2017

Co-transcribed 3' host sequences augment expression of integrated hepatitis B virus DNA

A F von Loringhoven, S Koch, P H Hofschneider

    The EMBO Journal
    |January 1, 1985
    PubMed
    Summary

    Hepatitis B virus (HBV) DNA fragments cloned from hepatoma cells express HBsAg. Different 3' sequences on viral transcripts significantly increase HBsAg production, aiding in understanding HBV expression.

    More Related Videos

    Detection of Low Copy Number Integrated Viral DNA Formed by In Vitro Hepatitis B Infection11:14

    Detection of Low Copy Number Integrated Viral DNA Formed by In Vitro Hepatitis B Infection

    Published on: November 7, 2018

    "Liver-on-a-Chip" Cultures of Primary Hepatocytes and Kupffer Cells for Hepatitis B Virus Infection10:25

    "Liver-on-a-Chip" Cultures of Primary Hepatocytes and Kupffer Cells for Hepatitis B Virus Infection

    Published on: February 19, 2019

    Related Concept Videos

    Retrovirus Life Cycles01:10

    Retrovirus Life Cycles

    Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the retrovirus to...
    DNA-only Transposons02:57

    DNA-only Transposons

    DNA-only transposons are called autonomous transposons since they code for the enzyme transposase that is required for the transposition mechanism. Insertion of transposons can alter gene functions in multiple ways. They can mutate the gene, alter gene expression by introducing a novel promoter or insulator sequence, introduce new splice sites, and change the mRNA transcripts produced, or remodel chromatin structure.
    The donor site from where the transposon is excised is either degraded or...
    Retroviruses02:33

    Retroviruses

    Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
    Viruses with RNA Genomes01:29

    Viruses with RNA Genomes

    RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
    Hepatitis01:25

    Hepatitis

    Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver. The...
    Viral Hepatitis I: Introduction01:28

    Viral Hepatitis I: Introduction

    Viral hepatitis is an inflammatory condition of the liver caused by infection with hepatotropic viruses, most commonly hepatitis A, B, C, D, and E. Despite variations in structure and transmission, all viruses mentioned infect hepatocytes and provoke immune responses that can hinder liver function. Additionally, some non-hepatotropic viruses can also lead to hepatic inflammation.Hepatitis A VirusHepatitis A virus (HAV) is transmitted through the fecal–oral route, typically by ingestion of food...