Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Phosphatase:

"

In in-vitro experiments, phosphatase enzymes seem to recognize many different substrates, and one substrate may be recognized by many different phosphatases. However, when experiments have been carried out in-vivo, phosphatase enzymes have been shown to be incredibly specific.[1] In some cases, a protein phosphatase (i.e. one defined by its recognition of protein substrates) can catalyze the dephosphorylation of nonprotein substrates.[3] Similarly, dual-specificity tyrosine phosphatases can dephosphorylate not only tyrosine residues, but also serine residues. Thus, one phosphatase can exhibit the qualities of multiple phosphatase families.[4]