
Keywords: XO، زانتی اکسیداز; Nitrite; Nitric oxide; Antarctic teleosts; Icefish; Xanthine oxidase; Cytochrome P-450NO, nitric oxide; NOS, nitric oxide synthase; XO, xanthine oxidase; CYP, cytochrome P-450; Hb, haemoglobin; Mb, myoglobin; CO, cardiac output; HR, heart rate; SV, stroke