Once inside the tumor tissue, these MTX-targeted PEG-CS-NPs will be internalized by the tumor cells, largely via FA receptor-mediated endocytosis (discussed below).
A firm's seizing capabilities come into play for the crafting of a revenue mechanism and the planning of the organization's value chain, including the designation of which activities will be internalized and which will be left to outside suppliers.
Once in the target tissue, the RNA-delivery system will be internalized by the target cell and, upon receptor-mediated endocytosis, will be able to escape from the endosomal compartment into the cell cytoplasm where RNA machinery is located, while avoiding lysosomal enzymes [ 40].
MHC I is expressed by all cells in an organism at a basal level, but unless the antigen they present induces binding of a CD8+ T-cell, the peptide will dissociate from the MHC I complex and the complex will be internalized.
Importantly, due to their large size most of the aggregates will not be internalized, and most of the internalized fluorescence corresponds to monomeric species, as confirmed by single-molecule photobleaching experiments (data not shown).
Notably, although high-molecular weight contaminants remain in our samples, they are unlikely to be an issue for internalization by electroporation as they will not be internalized as efficiently as our protein.
