Patterning of the dorsal-ventral axis in zebrafish is mediated by a graded source-sink mechanism in which diffusing BMP, produced from a ventrally biased source, is inhibited by dorsally-produced chordin.
Sexual arousal, exposure to aphrodisiac pheromones, or mere activation of peripheral pheromone-sensing neurons can modulate sleep homeostasis and are able to counteract the effects of sleep deprivation in Drosophila.
A concerted approach employing equilibrium and biased molecular simulations, electrophysiology, mutagenesis, and functional assays reveals, in atomic details, the mechanism and pathway for transport of phospholipids and ions by a lipid scramblase.
Regional differences in activator and inhibitor signals alter hair cycle pace across mouse skin and produce unique fur renewal 'landscapes', with fastest renewal on the ventrum and slowest renewal on the ear pinnae.
A fundamental lower-bound on memory recall precision, which declines with storage duration and number of stored items, is derived, and human performance is shown to be well-fit by this theoretical bound.