Fluorescein-conjugated antibodies to ovine prolactin localized in many acidophils of bovine pituitary glands. Aldehyde thionineperiodic acid-Schiff orange-G staining showed 2 types of acidophils; only one of these showed specific fluorescence with antiprolactin gamma globulin. The other type of acidophil showed fluorescence only with conjugated antisera to growth hormone. (Endocrinology 83: 731, 1968)
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Nayak et al. (1968) studied this question.