Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

Gamma-butyrobetaine dioxygenase is unique among other human 2OG oxygenases that it catalyses both hydroxylation (e.g.: L-carnitine), demethylation (e.g.: formaldehyde) and C-C bond formation (e.g.: (1-methylimidazolidin-4-yl)acetic acid).
What species is Gamma-butyrobetaine dioxygenase specific to?