Abstract: | Partial purification of the encephalomyocarditis protease synthesized in extracts from rabbit reticulocytes shows that the activity responsible for cleaving coat precursor protein cosediments with a previously unmapped virus-coded protein with an apparent molecular weight of 20,000. Tryptic analysis shows that this protein is derived from protein D, a virus-coded component of the encephalomyocarditis RNA polymerase. |