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Pronunciation: bī′lin, -līn

Definition: The chain of four pyrrole residues resulting from the cleavage of one bond of one of the four methylidene residues of the porphin part of a porphyrin; specifically, the unsubstituted tetrapyrrole; bilirubin and biliverdin are bilins.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.