The second gene cluster spanning the region 4,012,903−4,227,867 was composed of fourteen 30-kDa protein genes, nine of which expressed exclusively or mainly at an embryonic stage.
Only those family members which expressed exclusively or mainly in leaves and reproductive tissues were then selected for further detailed expression studies across an extended series of spike, carpel, seed and flag leaf developmental stages.
To visualize the morphological properties of individual TSCs at the three hair follicle types, we crossed the Plp1 CreER mouse line, which expresses CreER exclusively in glial cells (Doerflinger et al., 2003), to a Rosa26 YFP reporter mouse line, and achieved sparse labeling of TSCs by treating double transgenic animals with a single, low dose of tamoxifen (0.01 mg–0.03 mg; Figure 2E G).
In X ESxr bO mice, which express Zfy exclusively from the Zfy2/1 fusion gene, there is reduced MI apoptosis in response to the unpaired X ESxr b chromosome.
Finally, we attempted to determine parent of origin for expression of RSX (which is expressed exclusively from the inactive X chromosome [ 25]) to better elucidate which X chromosome was inactivated.
Moreover, CpG methylation is a hallmark of imprinted genes, which are expressed exclusively from the maternal or paternal allele and most of which play crucial roles in growth and development.
By WMISH, we first examined the expression of nodal and gsc, which are expressed exclusively in ventral ectoderm cells of control mesenchyme blastulae.
Growing fractions of both HC and cytokine-conditioned NPCs were also determined by the expression of the Ki67 antigen, which is expressed exclusively in proliferating cells during the late G1, S, G2 or M phase of the cell cycle.
It will be interesting to see whether layers 3, 4 and 5 of the cortex or the hippocampus which express Foxp1 only are exclusively abnormal in the Foxp1 knockout mouse.
Finally, the researchers mined a comprehensive atlas of genes expressed in the mouse brain to identify a cell surface receptor, called Npy1, which is expressed exclusively in dentate gyrus granule cells, and found that activating this receptor in normal mice with a synthetic peptide that selectively binds to it caused the same learning-induced memory loss seen in the other experiments.
