. "In the cytosol, choline kinase alpha subunit (CHKA) homodimer, choline kinase beta subunit (CHKB) dimer, or CHKA:CHKB heterodimer phosphorylates choline (Cho) to produce phosphocholine (PCho) (Malito et al. 2006, Gallego-Ortega et al. 2009)."^^ . . . .