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The HIV-1 RNA genome is a dimer which consists of two identical strands of RNA linked near their 5′ ends by a dimer linkage structure (DLS). We have structurally characterized full-length HIV-1 genomic RNA isolated from HIV-1 virions by electron microscopy. As in other retroviruses, the HIV-1 RNA genome contains a central dimer linkage structure and additional loop structures within each monomer subunit...
Newly released HIV-1 particles exhibit an immature morphology, previously reported to be characterized by a doughnut/ring-shaped structure. In this study we showed that among immature extracellular virus particles not only were particles with doughnut-shaped morphology present, but particles with a crescent morphology were also observed. These particles occurred with different frequencies, depending...