HBV-Core 18 kDa (residues 1-183) protein.Hepatitis B Virus Core Antigen, molecularweight: 18 kDa, contains the fragments of the Coreprotein immunodominant regions, amino acids: 1-183.HBV core proteins are purified by proprietary chromatographic techniques.Hepatitis B Virus (HBV) is a smallenveloped virus that belongs to the hepadnavirus family.The human Hepatitis B Virus (HBV) has a compact genomeencoding four majorfiverlapping coding regions: thecore, polymerase, surface and X. The core protein is astructural protein. It packages its own mRNA, which isalso known as the pregenomic RNA, to form the coreparticle. The increase of the core RNA expression hasbeen shown to increase the viral replication rate, 100 ug