MEME version 4 ALPHABET= ACGT strands: + - Background letter frequencies A 0.25 C 0.25 G 0.25 T 0.25 MOTIF Midbrain_E12.5_H3K9ac_19_156_0.624_8.28946e-311 letter-probability matrix: alength= 4 w= 12 nsites= 100 E= 1.0e-1 0.166 0.166 0.667 0.001 0.001 0.997 0.001 0.001 0.001 0.001 0.997 0.001 0.001 0.997 0.001 0.001 0.001 0.001 0.997 0.001 0.001 0.166 0.832 0.001 0.001 0.001 0.001 0.997 0.166 0.001 0.001 0.832 0.001 0.001 0.001 0.997 0.499 0.001 0.001 0.499 0.666 0.332 0.001 0.001 0.667 0.001 0.166 0.166