Figure 1
From: Daily cycling of nitric oxide synthase (NOS) in the hippocampus of pigeons (C. livia)
Enzymatic activity of cNOS and iNOS in hippocampus of pigeon. A- Mean values (+ s.e.m.) of the amount of L-citrulline (pmol/min/mg) produced by the reaction of the enzymatic activity of Ca2+ - dependent NOS (cNOS) in samples of hippocampal tissue homogenate. Data are expressed as ratio calculated relative to the mean of ZT0 group. One-way ANOVA. B- Mean values (+ s.e.m.) in the amount of L-citrulline (pmol/min/mg) produced by the reaction of the enzymatic activity of Ca2+ - independent NOS (iNOS) in samples of hippocampal tissue homogenate expressed as ratio relative to the mean of ZT0 group. One-way ANOVA indicated between group differences (p < 0.001); * indicates p < 0.05 when compared to ZT8, ZT12 and ZT16; # indicates p < 0.05 compared with ZT12 and (+ s.e.m.) ZT16 (Tukey-Kramer test; n = 4 pigeons per group).