Synonyms:APOBEC related protein, APOBEC related protein 9, APOBEC3G, ARCD, ARP 9, ARP9, bK150C2.7, CEM 15, CEM15, MDS019 Background:DNA deaminase(cytidine deaminase) which acts as an inhibitor of retrovirus replication and retrotransposon mobility via deaminase-dependent and-independent mechanisms. Exhibits potent antiviral activity against vif-deficient HIV-1. After the penetration of retroviral nucleocapsids into target cells of infection and the initiation of reverse transcription, it can induce the conversion of cytosine to uracil in the minus-sense single-strand viral DNA, leading to G-to-A hypermutations in the subsequent plus-strand viral DNA. The resultant detrimental levels of mutations in the proviral genome, along with a deamination-independent mechanism that works prior to the proviral integration, together exert efficient antiretroviral effects in infected target cells. Selectively targets single-stranded DNA and does not deaminate double-stranded DNA or single-or double-stranded RNA. Exhibits antiviral activity also against simian immunodeficiency viruses(SIVs), hepatitis B virus(HBV), equine infectious anemia virus(EIAV), xenotropic MuLV-related virus(XMRV) and simian foamy virus(SFV). May inhibit the mobility of LTR and non-LTR retrotransposons.