Screenshot of a tblastn search of the mtnAK enzyme from <i>Tetrahymena</i> (XP_001031773) against the EST sequences from <i>Tetrahymena</i> in GenBank.

<p>The EST sequences TT1BI24TH (acc: FF565362; evalue = 1×10<sup>−125</sup>) and TT1BI24TV (acc: FF565363; evalue = 2×10<sup>−125</sup>) correspond to the 5′- and 3′-end of a single cDNA clone, indicating that the fusion protein is expressed in <i>Tetrahymena</i>.</p>