When injected into humans, the agent itself or its proteinsubunits, will elicit a strong immune response, which will be protective against further infection from that agent.
当注入人体时，介质本身或其蛋白质亚基会引发很强的免疫反应从而避免对同种介质的进一步感染。
2
The protein has multiple subunits, each with a single ligand-binding site. Binding of ligand to one site decreases the binding affinity of other sites for the ligand.
During RNA replication - the phase during which the virus "reproduces" - all three of the subunits of the protein assemble themselves in a particular configuration.