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Reproductive status, such as the age of menarche or menopause, may be linked to cognitive abilities and risk for incident Alzheimer’s disease (AD) but the evidence is conflicting. It is also not fully known if these factors interact with cortical beta-amyloid deposition. To study the relationship between reproductive risks, sex hormone markers and risk for decline in specific cognitive domains in women.
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Several members of the Rhodobacterales (Alphaproteobacteria) produce a conserved horizontal gene transfer vector, called gene transfer agent (GTA), that appears to have evolved from a bacteriophage. The model system to study GTA biology is the R. capsulatus GTA (RcGTA), a small, tailed bacteriophage-like particle produced by a subset of the cells in a culture.
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