Researchers later isolate another residue that tends to be phosphorylated at position 259 of the aqp5 protein. if they desire to replicate the results described in the passage with a phosphomimetic mutant construct, this construct is most likely to be:

Mutagen

Explanation:

A mutagen is any substance capable of causing change in the base sequence of a gene.

It is usually SIMILAR in structure as the native protein or compound that binds to the receptor, and capable of Phosphorylation reactions as well

So, the construct is most likely a MUTAGEN.

its going to be mutualism cuz they both benefit from the relationship.

~batmans wife dun dun