Abstract
The serum thymic factor (FTS) or thymulin is a thymic hormone which has been characterized by its capacity to induce T cell markers on bone marrow cells.1 It is a nonapeptide whose amino acid sequence has been determined.2 We have recently demonstrated the existence of two forms of FTS: the first one without zinc and biologically inactive, and another which binds zinc and is biologically active, for which we recently proposed the name of thymulin.3 Practically thymulin or FTS-Zn represents the natural zinc-coupled peptide; the use of “FTS” is reserved for the synthetic material not coupled to the metal.
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References
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Dardenne, M., Bach, JF. (1984). Recent Data on the Structure, Localization and Function of the Serum Thymic Factor (Thymulin). In: Fudenberg, H.H., Whitten, H.D., Ambrogi, F. (eds) Immunomodulation. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-9358-4_4
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DOI: https://doi.org/10.1007/978-1-4615-9358-4_4
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