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miR-519 expression level is downregulated in breast cancer tissues. (A) Sequences of miR-519a-3p, miR-519b-3p and miR-519c-3p were highly conserved and shared the same seed sequence. (B) Relative mRNA levels of miR-519a-3p, miR-519b-3p and miR-519c-3p in breast cancer tissues (cancer group) and adjacent normal tissues (normal group). **P<0.001 vs. normal. n=20. miR, microRNA.
