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  • Title: Germ-line specific variants of components of the mitochondrial outer membrane import machinery in Drosophila.
    Author: Hwa JJ, Zhu AJ, Hiller MA, Kon CY, Fuller MT, Santel A.
    Journal: FEBS Lett; 2004 Aug 13; 572(1-3):141-6. PubMed ID: 15304338.
    Abstract:
    A search of the Drosophila genome for genes encoding components of the mitochondrial translocase of outer membrane (TOM) complex revealed duplication of genes encoding homologues of Tom20 and Tom40. Tom20 and Tom40 were represented by two differentially expressed homologues in the Drosophila genome. While dtom20 and dtom40 appeared to be expressed ubiquitously, the second variants, called tomboy20 and tomboy40, were expressed only in the male germ-line. Transcripts for tomboy20 and tomboy40 were detected in primary spermatocytes as well as post-meiotic stages. Transcription of tomboy20 and tomboy40 in spermatocytes was not dependent on the transcription factor Cannonball, which is responsible for controlling expression of gene products exclusively required for post-meiotic germ cell differentiation. Epitope-tagging and transient expression of dTom20 and Tomboy40 in mammalian cell culture showed proper targeting to mitochondria.
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