Tyrosinase(TYR) is the one of the most important rate-limiting enzymes in animals within the signal path of melanin synthesis, which plays a crucial role in the formation of melanin. So the expression and activity level decide the speed and type of melanin. This study was conducted to reveal the relationship between genes related to pigment and body color. We obtained tyrosinase gene(TYR) sequence of Amphilophuscitrinellus by rapid-amplification of c DNA ends(RACE) technique and also investigated the expres...