CDKL2 or cyclin-dependent kinase-like 2 is a member of a large family of CDC2-related serine/threonine protein kinases that is postnatally expressed in various brain regions. The extremely high CDKL2 expression in brain regions suggests that it has a role in cognition and emotion. CDKL2 transcripts increase in the deep cerebellar nuclei of the rabbit after eyeblink conditioning, a model of associative learning and memory CDKL2, also known as p56 KKIAMRE, accumulates primarily in the cytoplasm with lower levels in the nucleus (1). CDKL2 or p56, and the related protein kinase had a similar pattern of mRNA expression except in the reproductive organs. CDKL2 is expressed in several human tissues, with the highest expression in testis and kidney (2). CDKL2 Protein is ideal for investigators involved in Signaling Protein, Cellular Proteins, Cancer, Cell Cycle, and Ser/Thr Kinases research.