The bodies of vertebrate animals are asymmetric along three axes : Nodal, and Bone Morphogenic Proteins ( BMPs ), and 4 ) differential expression of membrane receptors and ligands that cause lateral inhibition, in which the receptor-expressing cell adopts one fate and its neighbors another.
42.
The genetic basis of this potential thermal adaptation has been studied by looking at genome-wide studies of gene expression and this study showed that differential expression of " Hsp70 " genes and a number of other genes could contribute to differences in thermal tolerance between these populations.
43.
In " Escherichia coli ", the osmoregulatory EnvZ / OmpR two-component system controls the differential expression of the porin proteins OmpF and OmpC . The KdpD sensor kinase proteins regulate the kdpFABC operon responsible for potassium transport in bacteria including " E . coli " and " Clostridium acetobutylicum ".
