35 isolates were considered to belong to the same epidemiological prevalent clone previously reported [4], [5], [9], [28] and 11 strains were consistent to be of different origin.
These tail-linker-tail sequences could be of different origin: it is possible that these sequences are an artefact of the PCR reactions; this assumption appears unlikely, as within the novel sequence there is also a 20 bp stretch present that is conserved also among the closely related parvovirus MVC.
Alternatively, but less parsimoniously, the nonprimate homologs might be of different origin.
There are several theories for the aetiology of endometriosis and it has been suggested that the peritoneal lesions, deep rectovaginal lesions, and ovarian endometriotic cysts called endometriomas would be of different origin (Nisolle and Donnez, 1997).
In summary, the PGK of Trimastix appears to be of different origin than PGKs of most eukaryotes and likely derives from an LGT event, although a bacterial donor lineage can not be determined.
The transcripts that did not align to a protein with more than 60% protein alignment length could be of different origin: (1) sense RNA encoding proteins not present in the published proteome databases, (2) sense RNA encoding proteins smaller than 60% of the complete protein, for example unknown small splice variants, (3) antisense RNA, (4) lncRNA, or (5) misassembled transcripts.
The physical mechanism that creates such response can be of different origins: heat [20], charge carriers [21], atoms [22].
Previous studies from anthropometrics, HLA and immunoglobulin have also suggested that Chinese ethnic groups can be divided into northern and southern groups, and that they may be of different origins.
It is striking that phylogenetic incongruence was found between the restriction and modification genes of the same RMS (see fig. 6 for examples), which suggests that the restriction and modification genes of the same RMS in the same strain could be of different origins.
In that case, however, the crescent may have been of different origin, formed by the base-to-base conjunction of two claws or horns.
Moreover, transplanted cells were of different origin, since adult rat neural stem cells were grafted [12] whereas we transplanted human embryonic neural progenitors.
