Related words. 1  high technology noun. 2  push technology noun. 3  technology therapy noun. 4  appropriate technology noun. 5  information technology noun. 6  intermediate technology noun. 7  clean technology noun at cleantech.8  blind someone with science/technology phrase. 9  modern technology. 10  the frontiers of knowledge/science/technology.0% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars.
Two receptors, CD4 and a co-receptor act sequentially to trigger fusion of viral and cellular membranes and confer virus entry into cells. For HIV-1, the chemokine receptor CCR5 is the predominant co-receptor exploited for transmission and replication in vivo.
Enmeshed in the viral envelope is a complex HIV protein called env. Two glycoproteins make up env and these protrude from the virion. The cap of the protein is called gp120 and the stem is gp41. For HIV to enter a host cell, it must first use gp120 to attach to a CD4 receptor.The CD4 receptor is found on CD4 T-cells and macrophages. The host cell has neutralising antibodies that can block gp120âs attachment, but because HIV is a new virus, there is some lag time in producing enough antibodies to prevent this.or HIV to enter a host cell, it must first use gp120 to attach to a CD4 receptor. The CD4 receptor is found on CD4 T-cells and macrophages. The host cell has neutralising antibodies that can block gp120âs attachment, but because HIV is a new virus, there is some lag time in producing enough antibodies to prevent this.