Enzyme EC numbers

EC (Enzyme Commission) numbers assigned by IUPAC-IUBMB

3. Hydrolases;
  3.1  Acting on ester bonds;
    3.1.4  Phosphoric-diester hydrolases
      3.1.4.-  3',5'-cyclic-AMP phosphodiesterase; cAMP-specific phosphodiesterase; cAMP-specific PDE; 
               PDE1; PDE2A; PDE2B; PDE4; PDE7; PDE8; PDEB1; PDEB2