Board Thread:Naruto Gaiden/@comment-4271790-20150625052107/@comment-1043414-20150701150909

Exactly, the fact that her DNA is so identical to Karin's leaves the idea, at least in my mind, that Sarada was put through an unorthodox experiment. Despite many people able to use the Wood Release after obtaining Hashirama's cells, only Yamata was able to use his Tailed Beast-controlling power because his DNA was also altered to match the First Hokage's.