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  • Title: Localization of SpoVAD to the inner membrane of spores of Bacillus subtilis.
    Author: Vepachedu VR, Setlow P.
    Journal: J Bacteriol; 2005 Aug; 187(16):5677-82. PubMed ID: 16077113.
    Abstract:
    The products of the hexacistronic spoVA operon of Bacillus subtilis may be involved in the transport of dipicolinic acid into the forespore during sporulation and its release during spore germination. The major hydrophilic coding region of B. subtilis spoVAD was cloned, the protein was expressed in Escherichia coli as a His tag fusion protein, and a rabbit antiserum was raised against the purified protein. Western blot analyses of fractions from B. subtilis spores showed that SpoVAD is an integral inner membrane protein present at levels >50-fold higher than those of the spore's nutrient germinant receptors that are also present in the inner membrane. SpoVAD also persisted in outgrowing spores.
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