MEME version 4 ALPHABET= ACGT strands: + - Background letter frequencies A 0.25 C 0.25 G 0.25 T 0.25 MOTIF E121_H3K27ac_15_134_0.540_6.10939e-164 letter-probability matrix: alength= 4 w= 6 nsites= 100 E= 1.0e-1 0.428174 0.398128 0.173698 0.0 0.864627 0.016179 0.119194 0.0 0.0 0.0 1.0 0.0 0.0 1.0 0.0 0.0 0.0 0.011311 0.002661 0.986028 0.898528 0.0 0.101472 0.0