The percentage of cross-linking in the copolymer lattice controls its porosity, A high porosity allows large molecules, such as proteins and antibodies, to penetrate the resin and exchange, whereas a low porosity excludes large molecules from exchanging with the resin.
That said, we always hear that China is taking a bigger place in the world and its economy, and so it's good to go there and see what's behind these great firewalls that prevent us from exchanging with them.
Using plasmid metagenomic analysis, Szczepanowski et al. (2009) reported evidence that new ARGs found in clinical bacterial isolates had resulted from exchange with wastewater bacteria.
The DNA−KWKK conjugate exhibited a strong G N1H → G NH NOE, suggesting that the guanine amino proton was shielded from exchange with water.
This suggests that the behavior apparent in Figures 2 and 4 predominantly arises from exchange with or via surface NH x groups.
Other models come from exchange with other collaborative model repositories, such as the former SBML model repository (Caltech, USA), JWS Online [ 61, 69], the Database Of Quantitative Cellular Signaling (DOQCS) [ 70, 71], and the CellML repository [ 16].
The guanine N1 base imino resonance at the site of conjugation was observed in isotope-edited N NMR experiments, suggesting that the conjugated guanine was inserted into the duplex and that the guanine imino proton was protected from exchange with water.
The signal was barely above the noise level, thus suggesting either that NH4+ binds only weakly to nucleotide-free DnaK-ABD, or that the binding sites are solvent-exposed and do not shield the ammonium protons from exchange with bulk solvent.
