... was demonstrated in the quail and frog lungs. In the duck heart, specific 2-[ 125 I]iodomelatonin binding sites with a K d of 30.5 ± 3.5 pmol/l and a B max of 0.46 ± 0.1 fmol/mg protein (n = 4) were demonstrated. Competitive studies suggested that these binding sites were specific to melatonin. Thus, saturable...

..., acetylcholine, epinephrine and norepinephrine. Studies on the relative binding density of [ 125 I]iodomelatonin to the kidney in different species of birds showed the following descending order: duck > chicken > pigeon > quail. It has been reported that [ I25 I]iodomelatonin-binding sites exist...