There are 99 recognized types of Human rhinoviruses that differ according to their surface proteins.

Known coronaviruses fall into three groups based on their surface proteins, he said, "and it looks like this is a fourth."

These two surface proteins define the virus's identity - the face that your immune system sees and attacks.

Very rarely, a virus comes along bearing a surface protein that your immune system has never seen.

In contrast, little is known about the surface proteins of the egg plasma membrane.

This lack of surface protein provides a less favorable environment for ice formation.

This is mainly directed against surface proteins which can be found on the virus.

The injections led to a sustained immune response specific to the surface protein in seven of the nine recipients.

They also express some different surface proteins from spirochetes.

As a result, the displayed proteins are the most outer surface proteins.