The distinction between current and forecast values does not always matter much, as (for example) high levels of inflation or output today may signal high levels of those variables in the future.
Authors have suggested that the growth of such traits is mediated by immune-stressing steroids such as testosterone, and that as only high quality males can "afford" exposure to immune stress, these traits signal high levels of immunocompetence [2] [7].
Several researchers have suggested that rapid life history changes should be interpreted as a warning sign of impending stock decline, as they typically signal high levels of mortality (Trippel 1995; Olsen et al. 2004).
In this way the cells in the early embryo would first respond to the different levels of BMP signalling: high levels of BMP would prime pluripotent cells to become part of the mesoderm, and low BMP levels would encourage differentiation into neuronal cells.
In tumors with activated Hh signaling, high levels of PTCH-1 have been reported, especially within the tumor stroma.
Importantly, we found a significant correlation between ERK5 steady-state levels and NF- κB signalling, where higher levels of ERK5 were associated with increased levels of NF- κB, reduced expression of I κB and increased NF- κB activation.
Immature DCs are characterized by relatively low expression of stimulatory signals and higher levels of inhibitory signals to T cells [ 13].
However, T cells receiving PD-1 signals displayed higher levels of cysteine-GSH disulfide and ophthtalmate, a GSH-like product synthesized by the same enzymes.
Mutants with reduced GLR-1 signaling or reduced levels of GLR-1 at the synapse have a lower frequency of spontaneous reversals, whereas mutants with increased GLR-1 signaling or higher levels of cell surface GLR-1 have a higher frequency of spontaneous reversal [21], [47], [48], [51] [53].
The ∆ gap1 cells, which cannot elicit this signal, have higher levels of trehalose.
