MEME version 4 ALPHABET= ACGT strands: + - Background letter frequencies A 0.25 C 0.25 G 0.25 T 0.25 MOTIF Forebrain_E13.5_H3K27ac_96_59_0.505_0.0007061894 letter-probability matrix: alength= 4 w= 13 nsites= 100 E= 1.0e-1 0.0 0.477914 0.0 0.522086 0.564448 0.013142 0.365423 0.056986 0.555963 0.357761 0.066082 0.020195 0.530414 0.371762 0.047561 0.050263 0.850724 0.050575 0.082267 0.016434 0.016764 0.844751 0.126374 0.01211 0.729904 0.02802 0.199028 0.043049 0.021534 0.909855 0.058821 0.00979 0.538474 0.109094 0.319815 0.032618 0.015801 0.897675 0.054533 0.031991 0.002822 0.918943 0.048226 0.03001 0.693056 0.079813 0.132938 0.094193 0.0 0.914091 0.040703 0.045206