Similarly to PuuE, additional structural elements located at the top of the barrel in HpPgdA obstruct the access to the active site (Fig. 5).
In January, he sued the owners of an adjoining property who built an addition, saying the new construction would "obstruct the access to light and air" and "impair or destroy protected historical resources" on his property.
This observation could be a result of the tendency of batch A to form high molecular weight aggregates, which could obstruct the access to the cavity and hamper ligand binding.
The presence in HP0310 of two additional helices, α-1 and α-2, and its tetrameric assembly, in particular the long arm protruding from a nearby subunit, obstruct the access to the active site.
In addition, after this test period, the participants of the interviews and a focus group discussion mentioned that various persons might more often obstruct the access to this particular ABHR dispenser.
The histone deacetylase (HDAC) [9, 10] removes acetyl groups from lysine residues leading to the formation of condensed chromatin via a strong association between histones and the long terminal repeat of HIV, which obstructs the access of transcription factors and represses gene expression [9, 10].
Molecular homology models suggest the rBmAChE enzyme possesses a W384F orthologous substitution near the catalytic site, where the larger tryptophan side chain obstructs the access of larger ligands to the active site, but functional analysis of this mutation suggests it only partially explains the low sensitivity to tacrine.
In general, HDACs catalyze the deacetylation of nucleossomes, that become highly condensed, obstructing the access of transcriptional activation factors to their binding sites and, therefore, resulting in transcriptional repression.
If tumor mass has grown from condyle into the infratemporal space with zygomatic arch obstructing the access, there are risks associated with surgical exposure and local resection of these masses.
