CERK is a symbol for the gene, Ceramide kinase, in humans. Other names include: hCERK; Acylsphingosine kinase; Lipid kinase 4; LK4; dA59H18.2; dA59H18.3. The encoded protein is an enzyme with an amino acid length of 537 and a mass of 60.0 kDa. Other isoforms may exist. This gene shares homology with other species, including: Fly, Mouse, Rat, Arabidopsis, Zebrafish, Frog, Chicken.