Enveloped viruses.
D000818:Animals; D002459:Cell Fusion; D006023:Glycoproteins / Q000378:metabolism; D006801:Humans; D050356:Lipid Metabolism; D014759:Viral Envelope Proteins / Q000378:metabolism; D019065:Virus Assembly; D014780:Viruses / Q000737:chemistry* / Q000145:classification / Q000378:metabolism
D006023:Glycoproteins; D014759:Viral Envelope Proteins