SIN3B and triple-negative breast carcinoma: However, high expression of SIN3A and low expression of SIN3B correlated with a longer relapse-free survival specifically in triple negative breast cancers (hazard ratios = 0.56 and 1.51; logrank P = 0.055 and 0.076 respectively for SIN3A and SIN3B) (Figure 5C, 5D).