Figure 2
Nucleotide composition difference between conserved and non-conserved pre-miRNAs. The A, U, G, and C composition difference between conserved (S c 1, S c 2, and S c 3) and non-conserved pre-miRNAs (S n ) from human (A), mouse (B), and chicken (C) genomes. The white, gray, and black bars respectively denote the values that S c 1, S c 2, and S c 3 mean nucleotide compositions minus that of S n . S c 1 for chicken was excluded as it contained fewer than five pre-miRNAs.