Lake Van
A 2012 study that sampled ethnic Armenians in eastern Turkey found no G1 (M285) among 207 men. But 2% of 104 samples at Sasun were G2a1 (P16) with no P16 found at Lake Van. In contrast, G2a (P15) but not G2a1 was found in 8% of Lake Van and 11% of Sasun men.