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Articles by Min Wei
Total Records ( 2 ) for Min Wei
  Weiyan Xu , Min Wei , Ming Zhang and Xibei Yang
  In the incomplete decision information systems, based on similarity relation, the concept of similarity and dissimilarity knowledge is firstly proposed. By the basic knowledge granule, two kinds of rough set model are defined and their properties are discussed. In these rough set models, based on similarity and dissimilarity knowledge, an approach is presented to acquire the positive and negative decision rules, respectively. The certainty factor is introduced to measure their certainty degree. Finally, to simplify these decision rules, this study introduces the heuristic algorithm of the attribute reduction based on the significant attributes and analyzes an illustrative example to prove its effectiveness.
  Min Wei , Yiliang Yang , Meijuan Niu , Laurie Desfosse , Robert Kennedy , Karin Musier-Forsyth and Lawrence Kleiman
  Attempts to use the mouse as a model system for studying AIDS are stymied by the multiple blocks to human immunodeficiency virus type 1 (HIV-1) replication that exist in mouse cells at the levels of viral entry, transcription, and Gag assembly and processing. In this report, we describe an additional block in the selective packaging of into HIV-1 produced in murine cells. HIV-1 and murine leukemia virus (MuLV) use and tRNAPro, respectively, as primers for reverse transcription. Selective packaging of into HIV-1 produced in human cells is much stronger than that for tRNAPro incorporation into MuLV produced in murine cells, and different packaging mechanisms are used. Thus, both lysyl-tRNA synthetase and GagPol are required for packaging into HIV-1, but neither prolyl-tRNA synthetase nor GagPol is required for tRNAPro packaging into MuLV. In this report, we show that when HIV-1 is produced in murine cells, the virus switches from an HIV-1-like incorporation of to an MuLV-like packaging of tRNAPro. The primer binding site in viral RNA remains complementary to , resulting in a significant decrease in reverse transcription and infectivity. Reduction in incorporation occurs even though both murine lysyl-tRNA synthetase and HIV-1 GagPol are packaged into the HIV-1 produced in murine cells. Nevertheless, the murine cell is able to support the select incorporation of into another retrovirus that uses as a primer, the mouse mammary tumor virus.
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