Known miRNAs discovered in B-cells from centenarians and controls. (A) Distribution of the miRNAs expressed in B-cells according to their sequence counts in centenarians and controls. On the vertical axis is a bin for miRNAs with sequence read counts within the given range. In the horizontal axis is the numbers of miRNAs found for each of the magnitudes of expression. (B) Top 10 known miRNAs expressed in B-cells from centenarians and controls, which constitute nearly 80% of all miRNAs expressed in the B-cells.