While cyclisation of the N-terminal glutamate of Aβ3 x appears to be enhanced by glutaminyl cyclase [55], [56], the process leading to the production of the Aβ3 x precursor itself remains unclear.
Because of sufficient complementarity between miR and miR* sequences, the accumulation of miR* could potentially regulate the miRNA precursor itself, as was shown for few cases in Arabidopsis [ 75] and rice (Li and Sunkar, unpublished data).
First, the toxin precursor itself is generally small, at 50 to 70 residues, such that it may be missed by ab initio gene finders.
On the contrary, the mixture of 18-Crown-6 and KHCO3 gave stable and relatively good labeling yield (21±5%5% non-decay-corrected). Considering factors that contribute to the stability of radiolabeling precursor itself, the weak alkali KHCO3 is more suitable than K2CO3 for the nucleophilic substitution.
Alternatively, the information might be contained in the precursor RNA itself in the form of a specific sequence or an RNA structural element.
The difference in abundance of the homologous or paralogous clusters may be attributed to the copy number of miRNA precursor itself or to the post-transcriptional regulation of the process of generating a mature miRNA from the precursor miRNA.> -wrap-foot> The underline indicated this family contains novel miRNAs.
One possible explanation is that the accumulation of miRNA* could regulate genes with sufficient complementarity or regulate its corresponding miRNA precursor itself during specific developmental stages (Table 2).
PDDMPV films could be uniaxially drawn at 150 160°C to a draw ratio of 5, and gave an electrical conductivity value of 27 S cm−1 when doped with I2, whereas I2-doped PDDMPV films, obtained from the precursor polymer that itself had been pre-drawn to the draw ratio of 5, exhibited a conductivity of 46 S cm−1.
The final major branch sees all other groups evolve from a common ancestor that appears to begin with the precursor to ER Group G, which itself appears to have evolved in three phases that are not restrained by the evolutionary history of the fungi.
Protein splicing is a post-translational modification, in which an intervening protein splicing domain (intein) catalyzes ligation of the two flanking N- and C-terminal segments (N-extein and C-extein) by a peptide bond and concomitantly excises itself from the precursor protein [1] [3].
