Writer enzyme in signaling is typically a
In the language of post-translational modification, kinases are writers that add phosphate groups while phosphatases are erasers that remove them. The opposing actions of these enzymes create dynamic, reversible molecular switches. The balance between writer and eraser activities determines the steady-state phosphorylation level and therefore the activity of the target protein.
Ref: NCERT Biology Class 11–12 Alberts et al Molecular Biology of the Cell Lodish et al, Molecular Cell Biology Cooper & Hausman, The Cell Abbas et al., Cellular and Molecular Immunology (for immunology sections)
