Fig. 3From: Constant light in early life induces fear-related behavior in chickens with suppressed melatonin secretion and disrupted hippocampal expression of clock- and BDNF-associated genesEffect of constant light exposure on 5-HT receptor and clock related gene mRNA expression in chicken’s hippocampus. A-B The mRNA expression of 5-hta, 5-htb, maoa and maob in 7 d and 21 d chickens; C-D The circadian clock genes mRNA expression in 7 d and 21 d chickens. Values are mean ± SEM (n = 12); *P < 0.05, compared with LDBack to article page