Fig. 5. Alignment of deduced amino acid sequences for major overlapping portions of the ORFs of the fast and S₁ myosin heavy chain (MHC) sequences (amino acids that match exactly are shaded). The corresponding base pairs are indicated on the left. The deduced sequences from the fast and S₁ ORFs share 81% identity and 91% similarity in this region of the molecule. The S₁ and fast forward MHC PCR primers begin at positions 1193 bp and 938 bp, respectively.