This design, while correlational, provided an intact and pharmacologically-naïve source of potential endogenous differences in DA bioavailability in DA neuropil in two groups significantly different in locomotor activity to address which TH phosphorylation site normally regulates DA bioavailability and which DA region influences specific aspects of inherent locomotor activity.
However, one possibility is that onset biases reflect stable endogenous differences in specific neural populations, while "recent perceptual history" may cause temporary changes in identical, overlapping or competing neural populations.
The redox responsive nanocarriers have made a considerable progress in achieving triggered drug release by responding to the endogenous occurring difference between the extra- and intra- cellular redox environments.
In one analysis which examined ten independent CAG-repeat-containing (non-CpG-containing) endogenous loci, differences in instability among the loci were noted (Brock et al. 1999).
Quantification of endogenous ABA revealed differences among cultivars but no substantial changes during infection with M. oryzae.
In the presence of endogenous gonadal steroids, differences between males and females may result from differential actions of androgens in males, or of estrogen/progesterone in females.
The endogenous sex hormone differences could also contribute to the greater bone density observed among AA women [ 42, 43], or, more broadly, the higher incidence of other hormone-related cancers among AA people [ 44].
The apparent reduction in this advantage (and in absolute values for this parameter) in type 2 diabetes might relate to the effect of endogenous insulin-buffering differences between the exogenous insulin comparators.
These may be due to differences in the endogenous glucosyl transferases, glucosidases, and/or differences in promoter strengths in different species.
This may reflect differences in the size and redox state of the AsA pool ('Ailsa Craig' fruits had generally lower totAsA-AsA concentrations and a higher % DHA than 'Santorini' fruits), differences in the capacity for endogenous AsA biosynthesis, or differences in the energetic requirements and capacity for transport of external AsA/DHA.
