>2k31_A mol:protein length:176 Phosphodiesterase 5A, cGMP-specific MDVTALCHKIFLHIHGLISADRYSLFLVCEDSSKDKFLISRLFDVAEGSTLEEASNNCIRLEWNKGIVGHVAAFGEPLNIKDAYEDPRFNAEVDQITGYKTQSILCMPIKNHREEVVGVAQAINKKSGNGGTFTEKDEKDFAEYLAFCGEVLHNAQLYETSLLENKRNLEHHHHHH