Immunogen sequence: MGCAPSIHIS ERLVAEDAPS PAAPPLSSGG PRLPQGQKTA ALPRTRGAGL LESELRDGSG KKVAVADVQF GPMRFHQDQL QVLLVFTKED NQCNGFCRAC EKAGFKCTVT KEAQAVLACF; Positive Samples: Mouse testis, Mouse eye, Mouse liver, Rat testis. Phosphodiesterases (PDEs) regulat