This sustained action might be explained either by enduring catalytic activity of EdTx in the cytosol due to high resistance to proteolytic degradation or be linked to its mode of cell entry.
Estimated "actual" regional-scale emission rates (EA) are needed for estimates of actual exposures and Level III fate calculations require mode-of-entry information.
For example, the representative human dietary preferences in the model are constant, and the assumed mode-of-entry information is based on default EU TGD emissions scenarios.
Chemical mode-of-entry information is required (i.e., relative percent release of a chemical to air, water, and soil) for Level III (i.e., steady state, nonequilibrium) fate simulations.
We used production volume estimates and the European Union Technical Guidance Document (EU TGD) emission factor scenarios (European Commission 2003) to estimate EA and chemical mode-of-entry to the environment [see Supplemental Material, pp. S7 S8 (http://dx.doi.org/10.1289/ehp.1205355)].
4 Reported rates for internalization vary from 30 min 38 to 4 h, 43 but it is generally agreed that the mode of entry is via a clathrin- and caveolae-independent mechanism that likely involves macropinocytosis 27 and/or lipid rafts.
Overall, our results suggest that, although penetration may occur through stomatal apertures, it is not likely to be the main mode of entry.
What is remarkable about this rapid catch up is not only its pace, but the choice of acquisitions in distant locations as the mode of entry by relatively inexperienced firms.
The dominant mode of entry of these materials into aquatic systems is through storm-generated runoff.
Monath, T. P., Cropp, C. B. & Harrison, A. K. Mode of entry of a neurotropic arbovirus into the central nervous system.
