Rabbit anti-Phospholipase C Protein 4 (internal region) polyclonal antibody for WB. Phosphoinositide phospholipase C (PLC) is a family of eukaryotic intracellular enzymes that play an important role in signal transduction processes. In general, this enzyme is denoted as Phospholipase C, although three other families of phospholipase C enzymes have been identified in bacteria and in eukaryotic trypanosomes. Phospholipases C enzymes belong to the family of hydrolases and phosphodiesterases.