Fig. 1.

Visualization of the importance of different dimers at different positions for the 12 variants of human poly(A) motifs. The x-axis gives the positions in the sequence. The y-axis lists all 16 possible dimers. The colors denote the levels of importance: the light green color for the positions 0–6 is the background color, which indicates that no effects differentiate true and false motifs; the darker the red, the more important the dimer at that position is to identifying true motifs; the darker the blue, the more important the dimer at that position is to identifying false motifs.