[aristeides]

Skimming this article, I found no statement about whether other Ashkenasim, who are not Levites, share this genetic signature. I would imagine they do -- I can't think of a reason why Ashkenazi Levites would share Khazar descent, when other Ashkenazim do not.

[Destro]

Well if I understood what i read-it seems this genetic strain was introduced into the Ashkenazi Levite genepool 1,000 years ago and thus it is not original to the "original" Ashkenazi Levites and thus explains it.