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Transfer factor - hypotheses for its structure and function

M Shifrine, R Scibienski

    Oncology
    |January 1, 1975
    PubMed
    Summary
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    Transfer factor (TF) is a polypeptide that transfers specific immunity. Researchers propose TF is an immunoglobulin domain, potentially binding with beta-2-microglobulin to form antigen receptors for immediate immune protection.

    Area of Science:

    • Immunology
    • Molecular Biology
    • Biochemistry

    Background:

    • Transfer factor (TF) is a substance derived from lymphocytes that transfers specific delayed hypersensitivity.
    • Its exact molecular nature and mechanism of action remain areas of investigation.

    Purpose of the Study:

    • To elucidate the molecular structure and function of transfer factor (TF).
    • To propose a model for TF's role in the immune system and its interaction with other molecules.

    Main Methods:

    • Analysis of TF's known properties, including its dialyzable nature and molecular weight (<15,000 daltons).
    • Hypothesizing TF's identity as a variable domain of immunoglobulin chains.
    • Proposing a model involving beta-2-microglobulin as a binding partner for TF.

    Related Experiment Videos

    Main Results:

    • TF is suggested to be a polypeptide with a molecular weight under 15,000 daltons.
    • A hypothesis posits TF as a variable domain of immunoglobulin light or heavy chain.
    • TF is proposed to function as part of a receptor site, potentially anchored by beta-2-microglobulin.

    Conclusions:

    • TF's structure is likely a variable immunoglobulin domain, conferring antigen specificity.
    • TF may combine with beta-2-microglobulin to form a complete antigen receptor.
    • TF provides immediate, specific immune protection while the adaptive immune response develops.