There are two problems: measuring time averages on a narrow set of dynamic processes and confounding of interaction within genes annotated to a pathway by unobserved quantities.
While accurately predicting IL-2 consumption will require accounting for cell proliferation and death, which exert stronger effects on longer (>3 day) timescales, our model reproduces the measured dynamics of the IL-2 production pathway for different quantities of antigens and numbers of T cells.
Atg7 is involved in macroautophagy, an intracellular pathway that regulates quantity and quality of organelles and proteins.
TRP-2 functions as a dopachrome tautomerase downstream of TYR in the melanogenic pathway or the quantity and quality of the melanin produced during melanin biosynthesis [ 31].
The preferred pathway for processing nonsymbolic quantities included the number-sensitive area in superior parietal cortex, whereas the pathway for processing symbolic quantities did not.
For nonsymbolic quantities, the pathway should include areas that perform the number-sensitive preprocessing steps (object location map and summation coding), whereas the pathway for symbolic quantities does not depend on these areas.
For nonsymbolic quantities, the pathway that includes the number-sensitive area in posterior superior parietal cortex is stronger.
With the recent availability of large quantities of pathway information such as KEGG (Ogata et al., 1999), GeneGo (http://www.genego.com) and BioCarta (http://www.biocarta.com[ 8]), pathway-based analysis has been used [ 9- 11] to perform classification of expression profiles and also applied to discriminate different classes of disease.
Despite their importance in pivotal signaling pathways due to trace quantities and complex matrices, the analysis of plant hormones is a challenge.
Management practices sufficiently altered the stand and canopy structure of pomegranate orchards to impact the quantity and pathway (throughfall v. stemflow) of rainfall reaching the ground.
It is imperative therefore to devise methods for activating unproductive biosynthetic pathways to provide the quantities of natural products needed for further development.
