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Pronunciation: yur'o-por'fi-rin


  1. Porphyrin excreted in the urine in porphyrinuria; urobilin.
  2. Class name for all porphyrins containing 4 acetic acid groups and 4 propionic acid groups in positions 1 through 8.

See Also: porphyrinogens

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