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Cricket paralysis virus, Israeli acute paralysis virus, and triatoma virus possess a conserved ternary motif (Asp-Asp-Phe) thought to catalyze the cleavage of VP0 into VP3 and VP4. In triatoma virus, a second identical triad exposed to the capsid interior is present in VP3. This motif is conserved in black queen cell virus, Himetobi P virus, and Plautia stali intestine virus.
See discussion under family description.
Sequence identity at the amino acid level between the capsid proteins of isolates and strains of a species is above 90%.
Triato: derived from the name of the type species of the genus, Triatoma virus.
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