In contrast, the orthologous pair of Os04g51320 and Sb06g027540, conserved the expression pattern in response to cold, drought, and salt (Fig. 4).
Intuitively, one might assume that the distance between two orthologous genes which have conserved the expression profile of their last common ancestor should be close to zero, and that this should hold regardless of the gene expression pattern.
According to this loss of expression model, boule has evolved by selective loss of expression, whereas dazl has conserved the original expression.
Theory concerning the evolution of dosage compensation predicts that stabilizing selection to conserve the ancestral expression ratios between autosomes and the nascent sex chromosomes should produce a global pattern of equal M F sex ratios on the sex chromosomes.
These functions of FOXO in the insulin signaling pathway and the response to ROS, and its role in promoting longevity, appear to be evolutionarily conserved: When the expression level of FOXO is perturbed, the corresponding changes in gene expression patterns as well as the resulting phenotypes are similar across distantly related species (reviewed by [26]).
Underlying the variability in the roles and morphogenesis of the notochord across the chordates is a core conserved feature: the expression of the gene brachyury (bra) and its apparent involvement in notochord specification throughout the phylum [ 2].
The comparisons between all three species show that even though fewer tags are conserved over this evolutionary distance, when they are conserved in sequence, the expression levels are conserved as well.
To compare the transcriptomes of resting memory CD8+ T cells from spleen and BM, we isolated CD44+CD127+CD8+ T cells from spleen and BM (Supporting Information Fig. 5), using an approach that we had demonstrated before to conserve the in vivo gene expression [ 37].
HSFs are highly conserved and direct the expression of heat-shock proteins in response to thermal stress.
These intragenic L1 sequences are conserved and regulate the expression of their host genes.
