In physiological conditions, in hepatocytes the active carriers are the the Na+-HCO3 symport and the Na+/H+ antiport, this latter being activated below 7.2 7.3 [ 18], whereas in the liver the activity of the Na+/H+ antiport is negligible above its set point of pHi 7.0 [ 10, 11]; other carriers such as Na/K/Cl cotransporter may be implicated.
An inspection of the I D - V G-traces yields in qualitative agreement with experiments that at low drain voltages transport becomes thermally activated below the threshold gate voltage while it does not for large drain voltages.
Temperature dependent Hall effect data show that (i) the conduction in these planar doped structures is thermally activated below 180 K, (ii) the free carriers sheet densities are near the metal insulator transition, and (iii) the low temperature mobility is controlled by ionized impurities scattering.
The switch should primarily depend on K-currents that activate below the firing threshold of the cell, such as the muscarine-sensitive M-current (associated with the CHRM gene).
This is a critical concentration in the lens because the UPR is activated below this concentration.
One candidate to mediate this effect is the persistent Na+ current (INaP) which is activated below firing threshold and amplifies EPSPs in hippocampal and neocortical neurons (Stuart and Sakmann 1995; Schwindt and Crill 1995; Andreasen and Lambert 1999; Fricker and Miles 2000).
We rationalized that if stress-inducing conditions activate pfsir2 (discussed below), then protection from stress might decrease pfsir2 activity.
Further, our results indicate that any cytokines present in CM from palmitate-treated muscle cells do not suffice to confer insulin resistance to naive muscle cells (i.e., muscle-to-muscle communication) while the same CM was able to activate macrophages (discussed below).
Surprisingly, we did not find any activation below V3A, especially V1 was not significantly activated in line with [1].
In qualitative agreement with the experiments the I D - V G-traces for small drain voltages show thermally activated transport below the threshold gate voltage.
