Most cells can defend themselves against viruses after they have been activated by the body’s own messenger substances (interferons). This happens with the help of proteins that recognize invading virus components and interfere with virus replication. One of these proteins is the myxovirus resistance protein B (MxB). It can inhibit many viruses, for example HIV and herpes viruses. But until now it was not clear how it does this.
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Source: Phys.org