Additional file 4.

Sampling sites and altitude distribution. Samples of Rana chensinensis were collected from Yaodu Township (105.45°E, 32.79°N) with an altitude of 604 m above sea level. Samples of R. kukunoris were collected from Zoige County (102.90°E, 33.58°N) with an altitude of 3,358 m above sea level.

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Yang et al. BMC Genomics 2012 13:588   doi:10.1186/1471-2164-13-588