Fig. 6. Sequence comparison of H1 (A) and H2 (B) elements in mouse and human Myf5 enhancer. The alignment was performed by the Clustal method. Nucleotide residues in the human sequence that are identical to the mouse sequence are indicated by dots. Different nucleotides are shown in boxes. Sequence gaps are marked by dashes. Exon sequences of the overlapping ptprq gene are highlighted between lines.