Mice lacking the UbCKmit isoform of creatine kinase reveal slower spatial learning acquisition, diminished exploration and habituation, and reduced acoustic startle reflex responses.
Streijger F, Jost CR, Oerlemans F, Ellenbroek BA, Cools AR, Wieringa B, Van der Zee CE. Mol Cell Biochem. 2004 Jan-Feb; 256-257(1-2):305-18.