Many groups have used CD34, CD133, and VEGFR2 surface markers in various combinations and successfully identified inverse correlations to disease states; however, recent reports have challenged the origin of cells with these markers and provide evidence that some of these cell populations, initially described as EPCs, are in fact myeloid-derived hematopoetic precursors [ 31].
We report the occurence of elav-like gene duplications and deletions in metazoans, and show that the vital elav gene of Drosophila is newly emerged, specific to dipterans and of retrotransposed origin, challenging its status of prototype for the family.
Gender homogeneous groups with participants of non-Dutch origin usually represented a heterogeneous mixture of ethnic and cultural origins, challenging both exercise trainers and participants to use Dutch as their common language.
The law that WhenU.com is challenging has its origins in a lawsuit against the company by a Utah company that sold contact lenses.
However, tracing back established mutualisms to their origin is challenging as no intermittent states are defined with which to measure the adaptation in terms of phenotypic traits, population size and local environment [1].
Note that it is challenging to determine the origin of additional variants that are not present in the sequences of the input strains but which may appear at high confidence in the data.
Scientists hope that DUSEL will allow them to explore a host of challenging questions about the origins of matter.
In 2009, two Bosnian citizens of Roma and of Jewish origin challenged the Dayton constitution at the European court of human rights and won.
On the same day, Nagib Assef, an Australian Greco-Roman wrestling champion of Turkish origin, challenged Maeda.
The latter result challenges the proposed origin of the mlo-11 mutant in the Ethiopian highlands.
