Assertion: virus's capsid | /r/HasProperty | the shell
Facets:
Source sentences:
text: But viruses evolve quickly and, every so often, some part of the protein that composes an infectious virus's capsid (the shell that protects the viral genome) acquires just the right electrochemical properties for binding to a cell-surface protein, tricking the cell into rolling out a welcome mat for its unwelcome guest.