Tyrosine-protein kinase CSK
（重定向自Src gene）
![](/Images/godic/202502/12/PBB_Protein_CSK_image4043.jpg")
![](/Images/godic/202502/12/PBB_GE_CSK_202329_at_tn4043.png")
Tyrosine-protein kinase CSK also known as C-terminal Src kinase is an enzyme that, in humans, is encoded by the CSK gene. This enzyme phosphorylates tyrosine residues located in the C-terminal end of Src-family kinases (SFKs) including SRC, HCK, FYN, LCK, LYN and YES1.