UBE2V1 and breast cancer: Compared with the five normal human breast samples, 33/43 or 77% of breast cancer samples display UEV1A expression above the highest UEV1A level in normal samples, or at least 1.7-fold higher than the average level among the five normal samples (Additional file 2: Figure S1B), suggesting that Uev1A may play a role in promoting breast tumorigenesis.