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  • Title: Localization of the Bcl-2 protein to the outer mitochondrial membrane by electron microscopy.
    Author: Riparbelli MG, Callaini G, Tripodi SA, Cintorino M, Tosi P, Dallai R.
    Journal: Exp Cell Res; 1995 Dec; 221(2):363-9. PubMed ID: 7493635.
    Abstract:
    Incubation with the Bcl-2 antibody before fixation of tissues allowed good localization of the antigenic determinant. We showed that the Bcl-2 gene product in centroblastic-centrocytic lymphoma is mainly localized on the outer mitochondrial membrane and, to a lesser degree, on the nuclear envelope. No significant staining was found in other cytoplasmic domains. Careful examination also revealed that gold particles did not recognize an integral membrane epitope, but an antigenic determinant localized at a short distance from the cytoplasmic side of the membrane itself. This observation suggests that, by interacting with other cytoplasmic proteins, Bcl-2 plays some role in the cytoplasmic machinery involved in the regulation of programmed cell death.
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