... profiles of melatonin, prolactin, ACTH, and cortisol in pigs J Anim Sci 1992, 70, 492498 Heuther G: The contribution of extrapineal sites of melatonin synthesis to circulating melatonin levels in higher ... pipetted into the tubes, followed by 100 µl of anti -melatonin antiserum (Kennaway G280; caprine against melatonin conjugated to bovine thyroglobulin, see Vaughan, 1993), and 100 µl of the 125I -melatonin ... photoperiod Plasma melatonin levels in pigs on plasma melatonin and cortisol profiles in young domestic boars, comparing two commercial melatonin assays Domest Anim Endocrinol 2000, 19, 261-274 Andersson...