Besides, polyadenylation in the intronic regions can result in conversion of an internal exon to a 3'-terminal exon (termed "composite terminal exon") or usage of a 3'-terminal exon that is otherwise skipped ("skipped terminal exon"; 7,20).
The C-terminal domain (composite of A250-A383 and A138-A156, α11 through α14 plus α5 and β8) belongs to the restriction endonuclease superfamily.
Moreover, the intronic polyadenylation activity appears to be dependent on cellular conditions, 5'-splice sites and intron size: larger introns with weaker donor splice sites prevail among exons used as composite terminal exons, whereas skipped terminal exons are associated mostly with strong polyadenylation signals [ 7, 21].
Tian et al. recently introduced the additional category of "composite" terminal exons, i.e. exons which can either be internal and spliced to a more downstream one, or terminal due to suppression of the 5' splice site and polyadenylation in the downstream intron [ 31].
Several terminal taxa are composites, listed here with suprageneric names, and are identified in table 1 of [ 24].
A2 incorporated the A1, morphological, and isozyme data and was reduced to 35 composite terminals representing all putative Pritchardia species.
We formed composite terminals [ 59] from the A1 matrix where taxa were combined at a level for which monophyly is assumed a prior thereby reducing missing data.
To minimize the number of missing entries in the dataset, composite terminals were constructed with individual partitions from different species of a higher taxon, usually a nominal "family" [see Additional File 4].
In the later, the overall channel from the base station (BS) to the user terminal (UT) is a composite one with an additional source of noise degrading the performance of point-to-point techniques [11].
We recently discovered two composite long terminal repeat (LTR -retrotransposon-like eLTR -retrotransposon-like (~300 kb) and Xiao (~30 kb), meaning big and smaLTR -retrotransposon-likey.
