Considering that DNA and histone modification is involved in both gene silencing and the expression of the fragile sites, we speculate that 45S rDNA fragility may be indicative of inactive 45S rRNA genes due to DNA and histone modifications, and of unique chromatin structures.
The number of reads per kilobase per million reads (RPKM) method was used to calculate the modification levels of unique genes (BGI, Shenzhen, China).
AlexaFluor 555 and 647 reactive maleimides are conjugated to PA monomers via sulfhydryl modification of the unique Cys residue introduced by the K563C mutation, forming PA K563C*AF555 and PA K563C*AF647, respectively.
Selected plasmids derived from both methods of random mutagenesis were further analysed and are listed in Table 2. Site-directed mutagenesis of the virS gene carried on pJIR2056 was performed using a modification of the unique site elimination method [34] with the U.S.E.
It is possible that post-translational modification of the unique C-terminus of PIPKIγ_i4, or interaction of a nucleartargeted protein with this sequence, could modulate its nuclear entry.
Our results suggest that secondary modifications of sequence properties unique to the lamprey lineage may be one of the factors preventing robust orthology assessments of lamprey genes, which deserves further genome-wide validation.
Advances in expressed protein ligation (EPL) methods that permit specific introduction of unique modifications into proteins have facilitated protein engineering, structure function and protein interaction studies.
We have recently explored the use of photodissociation methods, including infrared multiphoton dissociation (IRMPD) and ultraviolet photodissociation (UVPD), for the characterization of lipid A. UVPD led to the production of an impressive array of diagnostic fragment ions that facilitated mapping of unique modifications.
Novel noninvasive molecular cancer biomarkers may be identified by exploiting a technology based on the concept that tumor-associated proteases and tumor signature proteins, potentially combined with specific posttranslational modifications, result in release of unique protein degradation fragments to the circulation 10.
In recent years, the number of bisindoles and their gene clusters has greatly expanded, revealing a large genetic toolbox for the generation of unique structural modifications.
