Figure 1

BrdU labelled cells in the lateral ventricular choroid plexus during development of Monodelphis. A. Numbers of BrdU positive nuclei of the choroid plexus epithelial cells increased with each consecutive injection. After 3 injections of BrdU into young animals (P3, P4, P5) the number of labelled nuclei remained constant, suggesting a lack of significant turnover of the plexus during this time. B. Following injections into older animals (P63, P64, P65) fewer labelled cells were present, suggesting that there is little further growth of the plexus from P65 onwards. n = 6 at each age.