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Zinc-finger antiviral protein (ZAP) zinc finger domain 3 Zinc-finger antiviral protein (ZAP) is a host factor that specifically inhibits the replication of certain viruses, such as HIV-1, by targeting viral mRNA for degradation. N-terminal domain of ZAP is the major functional domain which contains four zinc-finger motifs. This entry represents the third zinc finger type CCCH.
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