Phosphodiesterase 6, the enzyme that catalyzes the hydrolysis of cyclic GMP, is composed of alpha and beta catalytic subunits and an inhibitory gamma subunit. The rod complex is a tetramer of one alpha subunit, one beta subunit and two gamma subunits – Pde6a, Pde6b and Pde6g, respectively (human gene listed for PDE6G, as there is no rat counterpart). The catalytic cone complex has a dimer of two alpha prime subunits (Pde6c) and an inhibitory gamma subunit (Pde6h). The members of the the Pde6 complex are listed with aliases in parentheses, full names and links to gene report pages:

Pde6a (PDEA, Rp43) – phosphdiesterase 6A
Pde6b (rd1, PDEB, Rp40) – phosphodiesterase 6B
PDE6G (PDEG) – phoshodiesterase 6G
Pde6c (PDEA2, COD4) – phosphodiesterase 6C
Pde6h (Rcd3) – phosphodiesterase 6H