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Immunoreactivity to endothelin was detected in conditioned culture medium from both canine and porcine tracheal epithelial cells. Gel permeation chromatography and fast protein liquid chromatography were used to confirm the identity of the endothelin. The two peaks demonstrated on fast protein liquid chromatography co-eluted with endothelin 1 and endothelin 3 respectively.
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Black et al. (1989) studied this question.
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