<prompt> Which HBV gene codes for HBe Ag?PreCCSXC  <response>: Ans. a Pre CC Ref. Ananthanarayan Microbiology 7thpg. 552HBV It is a partially double-stranded deoxyribonucleic acid DNA virus packaged with a core protein HBcAg and DNA polymerase, and enclosed by envelope proteins HBsAg. Following receptor-mediated entry into hepatocytes, the virus enters the nucleus, where its DNA is frequently integrated into the host genome.Protein synthesis proceeds from four open reading frames: The envelope proteins - Major, Middle, and Large HBsAg from the -S gene, pre-Sl, and pre-S2 gene sequences; The e antigen HBeAg and core protein HBcAg from the -C gene and pre-C gene sequence; The DNA polymerase protein from the -P gene; and The transactivator X-protein from the -X gene. 