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Normal 24-h urinary catecholamine levels in Efnb3 KO mice. Male and female Efnb3 KO and WT mice were placed in metabolic cages. Urine was collected during a 24-h fasting period. Urinary catecholamines were measured by competitive enzyme immunoassay. Means ± SE of hormones excreted during the 24-h period and mouse number per group (n) are presented. No statistically significant differences were found between KO and their WT counterparts (unpaired Student's t-test).
