4 research outputs found
Self-Similar Tilings of Fractal Blow-Ups
New tilings of certain subsets of are studied, tilings
associated with fractal blow-ups of certain similitude iterated function
systems (IFS). For each such IFS with attractor satisfying the open set
condition, our construction produces a usually infinite family of tilings that
satisfy the following properties: (1) the prototile set is finite; (2) the
tilings are repetitive (quasiperiodic); (3) each family contains
self-similartilings, usually infinitely many; and (4) when the IFS is rigid in
an appropriate sense, the tiling has no non-trivial symmetry; in particular the
tiling is non-periodic
Synthesis route of dehydroabietyltrimethyl ammonium bromine.
<p>Synthesis route of dehydroabietyltrimethyl ammonium bromine.</p
FTIR spectra of surfactant, as-synthesized and calcined supermicroporous titanias.
<p>FTIR spectra of surfactant, as-synthesized and calcined supermicroporous titanias.</p
Quantitation of Site-Specific Glycosylation in Manufactured Recombinant Monoclonal Antibody Drugs
During the development
of recombinant monoclonal antibody (rMAb) drugs, glycosylation receives
particular focus because changes in the attached glycans can have
a significant impact on the antibody effector functions. The vast
heterogeneity of structures that exist across glycosylation sites
hinders the in-depth analysis of glycan changes specific to an individual
protein within a complex mixture. In this study, we established a
sensitive and specific method for monitoring site-specific glycosylation
in rMAbs using multiple reaction monitoring (MRM) on an ultrahigh-performance
liquid chromatography–triple quadrupole MS (UHPLC-QqQ-MS).
Our results showed that irrespective of the IgG subclass expressed
in the drugs, the N-glycopeptide profiles are nearly the same but
differ in abundances. In all rMAb drugs, a single subclass of IgG
comprised over 97% of the total IgG content and showed over 97% N-glycan
site occupancy. This study demonstrates the utility of an MRM-based
method to rapidly characterize over 130 distinct glycopeptides and
determine the extent of site occupancy within minutes. Such multilevel
structural characterization is important for the successful development
of therapeutic antibodies