The loss of one functional copy of these essential splicing genes, without compensating expression, may lead to insufficient function in supporting photoreceptors especially because of their high demand for mRNA expression and protein synthesis.
Although this study suggests that, in normal cells, loss of p89c-Mybex9b expressisn is compensated by expression of the more abundant p75c-Myb isoform, it is conceivable that expression of p89c-Mybex9b is biologically more relevant in leukemic cells, which typically rely on c-Myb expression more than their normal counterparts.
This increased expression in XX mice is consistent with Jarid1c escape from X inactivation and is not compensated by expression from the Y-linked paralogue Jarid1d, which is expressed at a very low level compared to the X paralogue in P19 cells.
Indeed, expression was reduced with ~30%%, indicating that Nipbl heterozygousity is somewhat compensated by expression from the wild-type allele in mouse testis, similar to that previously reported for Nipbl +/− MEFs (Kawauchi et al. 2009).
3) Z-linked genes with similar expression levels in males and females differ in some respects from those are not compensated, including expression breadth, level, and variance.
The meiotic and postmeiotic silencing of G6pdx in B6 is compensated by expression of its functional retrogene G6pd2 on Chromosome 5 [28].
Figure 2 shows that, in placentas from mothers fed a control or high-fat diet, the Y-linked Kdm5d gene expression in males is not able to compensate the expression of Kdm5c, its X-linked paralogue escaping XIC, in females [ 61].
In order to characterizes and compensate for expression variations a quantification method based on Chromeo546-labled StrepTactinII was developed to quantify the number of FhuA Δ1-160 Δ1-160 outer E. colinmembrane (∼44000 of FhuA Δ1-160 per cell).
Thus, the existence of mechanisms to compensate for expression noise in complex cellular networks is not surprising.
Read density in the windows is normalized to the level of reads at the 3′ SS, to compensate for expression differences between genes.
