Protein phosphorylation regulates postmortem glycolysis by regulating the activity or stability of glycolytic enzymes (Huang et al., 2011). Shen and Du (2005) report that the glycolysis and pH decline are indirectly affected by the phosphorylation status of AMP-activated protein kinase (AMPK) in postmortem muscle. In brief, it can be concluded that protein phosphorylation regulates the rate and extent of pH decline in postmortem muscle by controlling the glycolysis reactions.