In this paper, we use the mitochondrial region cox1 to assess the usefulness of this marker in addressing evolutionary relationships within the tribe Orchideae. Despite the low overall variation ...

The degenerate primers CK6-5′ and ARK7-3′ (Palumbi, 1996) were initially used to amplify across an intron in the Ark locus. As these primers were not specific, the different bands obtained were cloned ...

Within multi-exon genes, after introns are removed, the exons must be spliced back together. Splice-enhancer domains (exon sequences near the intron–exon boundary) help to ensure that this happens ...

The tribe Thomsonieae (Araceae) comprise two genera of palaeotropical herbs: Amorphophallus with approximately 200 species and Pseudodracontium with seven species. A phylogenetic study of the ...

A novel type of “jumping gene” may explain why the genomes of complex cells aren’t all equally stuffed with noncoding sequences. All animals, plants, fungi and protists — which collectively make up ...

Shown is the splicing pathway. The pre-messenger RNA (pre-mRNA) has exons (blue) and introns (pink). The spliceosome (not shown) was known to catalyze two chemical reactions (black arrows) in a ...

Although the participation of spliceosomes is almost always required for intron removal, a few types of genes have ...