MEME version 4 ALPHABET= ACGT strands: + - Background letter frequencies A 0.25 C 0.25 G 0.25 T 0.25 MOTIF Midbrain_E15.5_H3K27me3_50_26_0.508_0.0001375941 letter-probability matrix: alength= 4 w= 13 nsites= 100 E= 1.0e-1 0.087465 0.0 0.905575 0.006959 0.83373 0.01804 0.091383 0.056848 0.11534 0.143023 0.737989 0.003648 0.030925 0.795317 0.079766 0.093992 0.024106 0.940367 0.019177 0.016351 0.672968 0.248157 0.060664 0.018211 0.06369 0.253411 0.659565 0.023334 0.02838 0.204685 0.763346 0.003588 0.037434 0.909183 0.0 0.053383 0.104473 0.093271 0.770926 0.03133 0.386301 0.07978 0.053166 0.480753 0.003528 0.573067 0.393535 0.02987 0.379134 0.438495 0.162125 0.020247