However, the stronger associations between heterozygotic genotypes and 5-HIAA and HVA concentrations, examples of positive heterosis [ 52], rather indicate a more complex physiology including interactions based on hidden stratification of unknown factors or heterozygotic advantage [ 52].
Revealing the superimposed fitness curve for each gene requires data on growth rates at various gene copy numbers (or protein concentrations), examples of which are starting to appear in the literature (Alcasabas and co-workers (submitted); [ 28]).
The cows were divided into subgroups with minimal variation in fibrinogen concentration (for example, a subgroup with concentrations between 5.1 g/l and 6.0 g/l was used).
Taste mechanisms require relatively high concentrations; for example, salt and sweet tastes have thresholds of around 0.01 molar.
Moreover, fewer concentrations (for example, eight concentrations) could conserve many ligands.
Nitrate has maximum concentrations for example, 13.1, 12.25 and 14.58 mg/L occurring within deeper zones.
Improvements in image acquisition that reduce imaging uncertainty at low probe concentrations, for example, improved timing resolution for time-of-flight imaging in PET, will be important [16].
To this end, the observed EC50 values and CA-predicted EC50 values were re-calculated based on measured concentrations (see example calculation in Appendix).
Other arc melt inclusions with low Ce concentration also extend to higher Ce concentrations, for example up to 35 ppm in Lesser Antilles (Bouvier et al. 2010) and up to 30 ppm in Central America (Sadofsky et al. 2008).
Thus, differences in enzyme concentrations, for example, would have influenced the earlier results but not ours.
