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  • HIV Protease Inhibitors

    HIV Protease Inhibitors

    Activity

    This demonstration models how the HIV protease enzyme functions and how its activity is blocked by a class of anti-HIV drugs.

  • HIV Life Cycle Activities

    HIV Life Cycle Activities

    Collection

    A collection of activities and demonstrations focusing on various aspects of the human immunodeficiency virus (HIV) life cycle. They are designed to be completed individually or as part of the series...

  • Viral DNA Integration

    Viral DNA Integration

    Activity

    In this hands-on activity, students model how a double-stranded DNA copy of the HIV genome is integrated into the host cell DNA.

  • HIV Reverse Transcription and AZT

    HIV Reverse Transcription and AZT

    Activity

    Students model how the anti-HIV drug AZT (azidothymidine) interferes with the process of viral replication.

  • HIV Receptors and Co-receptors

    HIV Receptors and Co-receptors

    Activity

    This demonstration models the first step of the HIV life cycle: the binding of HIV envelope proteins to receptors on human helper T cells.

  • Structure of Dengue Virus

    Structure of Dengue Virus

    Animation

    (1 min 3 sec) The dengue virus's outer envelope proteins form symmetrical units and overlay the lipid envelope, capsid, and the RNA genome.

  • Biodiversity at a Snail's Pace

    Biodiversity at a Snail's Pace

    Lecture

    (58 min 29 sec) Cone snails have evolved many different toxins for different uses. Total molecular biodiversity may number in the millions.

  • PPAR-gamma Activation in the Fat Cell

    PPAR-gamma Activation in the Fat Cell

    Animation

    (2 min 49 sec) The PPAR-gamma receptor activates certain genes in a fat cell, resulting in the storage of fat and changes in hormone levels.