Histochemical staining showed that tyrosinase activity was present only in the PON skin but not in the AOA skin, and the white skin of blind side of albino (termed WBA skin) and normal turbot (termed WBN skin).

• 组织化学染色显示:酪氨酸酶的活性只出现在大菱醉PON皮肤中，而AOA、WBN、WBA三种皮肤中都没有酪氨酸酶活性。 在PON皮肤中发现了大量的黑色素细胞，而AOA、WBA、WBN中没有黑色细胞。