MEME version 4 ALPHABET= ACGT strands: + - Background letter frequencies A 0.25 C 0.25 G 0.25 T 0.25 MOTIF E021_H3K27me3_33_17_0.512_1.069639e-21 letter-probability matrix: alength= 4 w= 12 nsites= 100 E= 1.0e-1 0.017992 0.919577 0.018163 0.044268 0.057455 0.006634 0.839412 0.096498 0.038027 0.821176 0.041333 0.099465 0.043314 0.907578 0.020538 0.028571 0.052743 0.009168 0.769663 0.168427 0.207944 0.032935 0.694826 0.064295 0.004557 0.017454 0.953488 0.024501 0.124282 0.042122 0.777505 0.056092 0.47085 0.060804 0.067946 0.400399 0.012896 0.972523 0.014582 0.0 0.723741 0.147536 0.031672 0.097051 0.0 0.959087 0.040913 0.0