HBV virus particles. A. The infectious (Dane) particle contains surface antigen (HBsAg), the partially double stranded (ds) DNA genome (ss = single strand), the viral RNA dependent, DNA polymerase, and the core antigen (HBcAg). HBsAg is released into serum as spherical particles (B) or tubular structures (C). These particles do not carry viral DNA, HBcAg or the viral polymerase.