Gp41 also known as glycoprotein 41 is a subunit of the envelope protein complex of retroviruses, including human immunodeficiency virus (HIV).
Gp41 is a transmembrane protein that contains several sites within its ectodomain that is required for infection of host cells.
As a result of its importance in host cell infection, it has also received much attention as a potential target for HIV serological test for diagnosis.
This is targetted especially in Europe and group M subtype B. | 
