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Adenohypophysial cell types in the pituitary of adult sea lampreys, Petromyzon marinus, was localized by means of immunocytochemical and lectin cytochemical techniques. At least four types of adenohypophysial hormone cells are present in the pituitary of adult sea lampreys. The first type of cell is ACTH-like and occupies most parts of the rostral pars distalis (RPD), but a few scattered ACTH-like...
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