Nonstructural protein 4A (NS4A) is a
viral protein
A viral protein is both a component and a product of a virus. Viral proteins are grouped according to their functions, and groups of viral proteins include structural proteins, nonstructural proteins, regulatory proteins, and accessory proteins. Vi ...
found in the
hepatitis C virus
The hepatitis C virus (HCV) is a small (55–65 nm in size), enveloped, positive-sense single-stranded RNA virus of the family ''Flaviviridae''. The hepatitis C virus is the cause of hepatitis C and some cancers such as liver cancer ( hepato ...
. It acts as a
cofactor for the enzyme
NS3.
References
Viral nonstructural proteins
Hepatitis C virus
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