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MLL1 morpheme distribution and occurrences in promoters of human protein-coding genes: CGCG, red full circles; CGGCG, blue full circles; CGCCCG, magenta empty circles; CGACG, green empty circles; CGGACG, light blue empty circles; CGCGCG, black circles; CGTGCG, x magenta; CGTACG, + red.
