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  • Title: [Purification and characterization of epidermal G2- and G1-chalones].
    Author: Okulov VB, Ketlinskiĭ SA, Ratovitskiĭ EA, Kalinovskiĭ VP.
    Journal: Biokhimiia; 1978 Jun; 43(6):971-8. PubMed ID: 149568.
    Abstract:
    Highly purified epidermal G1- and G2-chalones from rat skin inhibit the entering of epidermocytes to S and M phases of cell cycle respectively. Their biological activity is characterized by tissue-specificity and not by species-specificity. Both of them are tissue-specific glycoproteins as for their antigenic properties. Molecular weight of G1-chlone is 21 000, G2-chalone--34 000, isoelectric point (pH) 5.55 and 5.85 respectively. G2-chalone is the fastest as compared to G1-chalone in 5% acrylamide gel electrophoresis, pH 8.3. When injected in rabbits, G2-chalone produced monospecific antibodies which have no cross-reactivity with G1-chalone. The amino acid composition of both chalones and immunofluorescent localization of G2-chalone in epidermal tisues are given.
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