MEME version 4 ALPHABET= ACGT strands: + - Background letter frequencies A 0.25 C 0.25 G 0.25 T 0.25 MOTIF Neural-Tube_E15.5_H3K4me1_69_149_0.512_8.470965e-57 letter-probability matrix: alength= 4 w= 6 nsites= 100 E= 1.0e-1 0.814054 0.0 0.0 0.185946 0.0 0.050054 0.931616 0.01833 0.041397 0.84064 0.117963 0.0 0.786095 0.020163 0.0 0.193742 0.0 0.588729 0.411271 0.0 0.990668 0.0 0.009332 0.0