The LacI-family of TFs plays a crucial role in many bacterial species, and certainly in those of the phylum Firmicutes, as these TFs mediate preferences in the utilization of certain carbohydrates over others.
Shohat-Ophir and colleagues suspected that a chemical in the brain called neuropeptide F (NPF) might play a role in the link, as it's been previously discovered to mediate alcohol preference.
These studies suggest microglia might mediate alcohol preference and might contribute to the development of alcohol use disorder.
The X-ray structure of Tat-AFF4-P-TEFb reveals subunit interactions that mediate the preference of Tat for SECs over other P-TEFb complexes.
Furthermore, addition of TSH{GAL80} did not rescue the loss of egg-laying attraction, indicating that Gr66a receptors on the legs do not mediate oviposition preference.
The coevolution of male traits and female mate preferences has led to the elaboration and diversification of sexually selected traits; however the mechanisms that mediate trait-preference coevolution are largely unknown.
One possible mechanism mediating this preference is altered testosterone levels; men raised in environments with frequent diseases and germ exposure tend to have lower testosterone levels through adulthood, because testosterone can handicap immune function.
Anecdotally, some animals in captivity have been noted to have preferences for food fish types, although it is not clear if taste mediates this preference.
This supports the earlier suggestion, based on behavioral testing, that salivary ABP (the Abpa gene, now Abpa11) mediates mate preference [ 29, 30].
Early "sweaty t-shirt" studies suggested that MHC-dissimilarity mediates odor preference for a potential mate, but follow-up studies highlighted a variety of confounding factors in this phenomenon, such as genetic background, sex, and contraceptive use [ 31- 36], providing a partial explanation for the conflicting results.
