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Example sentences for: ancestor

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The α subunit further stabilizes this cleft, whereas the ω subunit interacts with the β' subunit [ 7 ] . Given their ubiquitous presence in all cellular life forms and high level of sequence conservation, it seems evident that the core subunits of this complex RNA synthesis machine were already present in the last universal common ancestor (LUCA) of the extant cellular life forms and performed functions mechanistically similar to those of modern DDRP.
The Russian NKVD was the 1930s ancestor of the KGB.
One explanation for the discrepancy between phylogenetic classification and distribution of the A-ATPase intein is horizontal gene transfer: the intein was not present in the last common ancestor of Thermoplasma and Pyrococcus, rather the intein invaded one of the lineages after their split and was more recently horizontally transferred to the other lineage.
Should a gene appear to be present in other closely related plant parasites, such as the cyst nematodes, the transfer event probably affected a common ancestor of the two families of parasitic nematodes (event 'a' in Figure 1).
The RDRP is present in one or more copies in a wide range of eukaryotes, from early-branching parabasalids, such as Giardia , to multicellular forms, including fungi, plants and animals [ 57 58 ] . This broad representation in eukaryotes, including organisms that are considered primitive, suggests that RDRP might have been encoded in the genome of the common ancestor of all modern eukaryotes.