The Circular, Segmented Nucleocaspid of an Arenavirus-Tacaribe Virus Palmer, E. L. and Obijeski, J. F. and Webb, Patricia A. and Johnson, K. M.,, 36, 541-545 (1977), doi = https://doi.org/10.1099/0022-1317-36-3-541, publicationName = Microbiology Society, issn = 0022-1317, abstract= SUMMARY The nucleocapsid structures of Tacaribe virus, a member of the Arenaviridae, were purified from detergent-treated virus particles by equilibrium density gradient centrifugation. Negative-contrast electron microscopy indicated that they were coiled, circular filaments. They had a mean diam. of 5 to 10 nm and two predominant length classes of 640 nm and 1300 nm were found., language=, type=