Figure - PMC

PMC full text:

J Virol. 1987 May; 61(5): 1726–1730.

doi: 10.1128/jvi.61.5.1726-1730.1987

Copyright/LicenseRequest permission to reuse

PMC Copyright notice

An external file that holds a picture, illustration, etc.
Object name is jvirol00096-0439-a.jpg

Open in a separate window

-