This is because of the greater surface area available to react with epithelial and inflammatory cells in the lung and because of the capacity of ultrafine particles to penetrate deeper in the lung parenchyma, potentially reaching the circulation and exerting adverse biological effects by releasing toxic free radicals [ 8- 11].
At a low iron dosage, there is less Fe2+ ions are available to react with oxidant and then the H2O2 is going to react with already produced ·OH radicals to form a ·OOH radical shown in Eq. (12) and the formed ·OOH radicals were having less oxidation capacity than ·OH radicals (Masomboon et al. 2009).
The NAD+ would then be available to react with ALDH, and the complex would oxidize CH to TCA with subsequent release of NADH.
An increase in peroxynitrite activity can be predicted to occur in this model since the genetic defect leads to decreased dismutation of superoxide to hydrogen peroxide, thus increasing the relative amount of superoxide available to react with NO and form peroxynitrite.
In addition, SMF is not properly excreted through urine due to renal reabsorption, thus allowing SMF to accumulate in the plasma, making it available to react with cellular proteins and DNA.
If C22 and C28 were normally bound together as an intramolecular disulfide one might predict that the lone cysteines of the single C22S and C28S mutants in their native virion states would be free and available to react with BMCC-biotin.
Amine groups are present in abundance on the surface of various tissues (18) and are available to react with N-hydroxysuccinamide.
In principle these oxidised cysteines residues would not be available to react with an alkylating agent such as pyrrole, and modification of amino acid residues other than cysteine may have occurred.
Particle sizing using DLS suggests that in the buffer used for the DCFH-DA assay (Hepes-buffered (20 mM) Hanks balanced salt solution with glucose (5 mM)), magnetite forms bigger agglomerates than maghemite, thus magnetite would have less exposed surface area and potentially less ions available to react (Table 1).
More significantly, alanine's anticodons pair very well with anticodons of several electron acceptor amino acids: glycine, proline, histidine (whose codon would originally be assigned to aspartic acid), and arginine, making it readily available to react.
These electrons are available to react in the coupled redox reaction in which Si is oxidized and Cu is reduced.
