Purification and partial characterization of hepatitis e antigen (HBeAg).
AUTOR(ES)
Fields, H A
RESUMO
Purification of hepatitis e antigen (HBeAg) from 200 ml of chimpanzee plasma was accomplished by a combination of ion-exchange chromatography on diethylaminoethyl-cellulose followed by gel filtration. High-resolution sodium dodecyl sulfate-polyacrylamide gel electrophoresis of purified HBeAg demonstrated two major polypeptides with estimated molecular weights of 22,000 and 55,000. HBeAg labeled with 125I showed a high affinity for protein A-conjugated Sepharose CL-4B. The precipitation reaction between HBeAg and anti-HBe was inhibited by preincubating the purified antigen with rabbit anti-human immunoglobulin G (IgG). These data show that HBeAg is associated with a serum fraction with the biophysical and antigenic properties of an immunoblobulin of the IgG class. Sedimentation coefficient analysis of purified HbeAg resulted in an S20w value of 11.6 and a molecular weight value of 324,000. These findings, supported by gel filitration and polyacrylamide gradient gel electrophoresis, revealed that HBeAg has properties analogous to those of a dimer of IgG.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=421928Documentos Relacionados
- Third Component, HBeAg/3, of Hepatitis B e Antigen System, Identified by Three Different Double-Diffusion Techniques
- Hepatitis B virus and polymyalgia rheumatica: a search for HBsAg, HBsAb, HBcAb, HBeAg, and HBeAb.
- Hepatocyte expression of HBcAg and serum HBeAg in hepatitis B: comparison of polyclonal and monoclonal antibodies during a trial of interferon.
- Antibodies to the hepatitis B e antigen (HBeAg) can be induced in HBeAg-transgenic mice by adoptive transfer of a specific T-helper 2 cell clone.
- Longitudinal Study of Hepatitis Activity and Viral Replication before and after HBeAg Seroconversion in Chronic Hepatitis B Patients Infected with Genotypes B and C
