The localization of a TERT activator on the avian Z chromosome could result in higher levels of telomerase activity in male than female birds because the expression of genes localized on bird sex chromosomes is also weakly dosage-compensated.
In the bursae of infected birds, the mRNA expression levels of the pro-inflammatory cytokine IL-1β were not statistically different from those in controls.
Although several melanin-based colour polymorphisms in wild birds depend on the expression of the melanocortin-1 receptor gene [MC1R; 8,26,48–51], a number of other genes coding for receptors of other different melanocortins are also involved in melanin production [51].
However, positive relationships between sexual dichromatism and the rate of extra-pair paternity across species of birds suggest that the expression of secondary sexual characters has coevolved with extra-pair paternity [ 32].
Valmiki's own sadness at the slaying of the male bird takes expression as the first "sloka" of the Ramayana.
In the RES birds, ABCG5 expression remained high regardless of dietary treatment, whereas in the SUS birds, an increased level of ABCG5 expression could be induced by a cholesterol-enhanced diet.
The Overview on the left provides a bird's-eye view of the expression profile of all significant genes (Fig. 1A).
In the SUS birds, ABCG5 expression regressed (r = 0.48) significantly (P < 0.008) and positively on plasma LDL level (Table 9, Figure 3), whereas DHCR7 and SQLE expression regressed significantly (P < 0.04 and P < 0.02, respectively) and negatively on plasma triglyceride level (Table 9, Figures 4A and 5A).
If you are close enough, look at the expression in the bird's eyes.
In order to facilitate comparisons with other studies of gene expression in birds the Fold Changes given here were calculated separately on unlogged data for the significant genes, as mean male-expression over mean female-expression.
