Figure 2

Divergence along the archaeal and vacuolar ATPase A subunits. The diagram depicts the number of substitutions per site calculated for a sliding window of 10 amino acid residues along an alignment of 62 vacuolar and archaeal ATPase catalytic subunits. The ordinate gives the number of substitutions observed in each position in the alignment. Arrows indicate the locations of the inteins. The first (A) gives the location of the inteins in Thermoplasma and Pyrococcus, the second (B) gives the location in the yeasts' vacuolar ATPases.