It codes for seven structural proteins and one non-structural protein.

Coronaviruses have a non-structural protein called a protease which is able to separate the proteins in the chain.

The non-structural proteins are encoded at the 5' end, formed during the first of two characteristic rounds of translation.

The non-structural proteins (nsP) play different functions in the virus cycle.

The virus encodes these activities in its non-structural proteins.

Three non-structural proteins have been found (1).

Early gene expression is responsible for the synthesis of non-structural proteins.

Since Polyomaviruses rely on the host to control both the gene expression, the role of the non-structural proteins is to regulate the cellular mechanisms.

The early genes are responsible for expressing mainly non-structural, regulatory proteins.

NS3 protease, on the other hand, is responsible for the cleavage of non-structural proteins downstream.