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  • 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.

  • Efficacy of a Treatment for Chronic Myeloid Leukemia

    Efficacy of a Treatment for Chronic Myeloid Leukemia

    Data Point

    Dr. Brian Druker and colleagues monitored white blood cell counts in six patients with chronic myeloid leukemia treated with the drug, STI571, which blocks the activity of the cancer-causing tyrosine kinase BCR-ABL.

  • Seeing Single Molecules Move

    Seeing Single Molecules Move

    Animation

    (1 min 40 sec) Single-molecule analysis using super-resolution microscopes reveals that transcription factors are not usually found bound to their binding sites on DNA.

  • BCR-ABL: Cancer Protein Structure and Function

    BCR-ABL: Cancer Protein Structure and Function

    Click & Learn

    This Click and Learn describes how understanding the structure of the BCR-ABL kinase led to the development of an effective treatment for chronic myeloid leukemia.

  • Gleevec-Resistant Form of Kinase BCR-ABL

    Gleevec-Resistant Form of Kinase BCR-ABL

    Animation

    (2 min 14 sec) Mutations in the BCR-ABL gene can cause resistance to Gleevec, but another drug, dasatinib, can be used instead.

  • Gleevec Inhibits Cancer-Causing Kinase BCR-ABL

    Gleevec Inhibits Cancer-Causing Kinase BCR-ABL

    Animation

    (3 min 31 sec) The drug Gleevec binds to and inactivates BCR-ABL, a mutant kinase that causes chronic myeloid leukemia. 

  • The Proteasome and Protein Regulation

    The Proteasome and Protein Regulation

    Click & Learn

    Learn about the structure and function of this fascinating cellular machine.

  • Triplet code

    Triplet code

    Animation

    (1 min 8 sec) Once the structure of DNA was discovered, the next challenge was determining how the sequence of letters coded for the 20 amino acids. In theory, one or two letters can only code for 4 or 16 amino acids, respectively. A scheme using three letters, a triplet code, is the minimum necessary to encode for all the amino acids.

  • The Proteasome

    The Proteasome

    Animation

    (1 min 44 sec) A 3D animation showing how proteins in the cell are tagged for disposal and degraded by the proteasome.

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