Ketimine reductase mu-crystallin (CRYM)

Specifically catalyzes the reduction of imine bonds in brain substrates which might include cystathionine ketimine (CysK) and lanthionine ketimine (LK). Binds thyroid hormone which is a powerful reversible inhibitor.

Presumably involved in the regulation of the free intracellular concentration of triiodothyronine and access to its nuclear receptors. .