highly significantp < 0.01
Analysis of Serum Biochemical Indicators As shown in Table 1 , comparative analysis of physiological and biochemical indicators between Duolang sheep from southern and northern Xinjiang revealed highly significant differences ( p < 0.01) in the levels of glutathione peroxidase (GSH-PX, U/mL), interleukin-2 (IL-2, ng/L), and immunoglobulin G (IgG, mg/mL).