| 释义 |
porphyrinogen porphyrinogen [por″fĭ-rin´o-jen] the reduced form of a porphyrin. The porphyrinogens are the functional intermediates in the biosynthesis of heme and if oxidized to their corresponding porphyrins, such as occurs in porphyrias, are irreversibly removed from the biosynthetic pathway and accumulate in tissues. Their nomenclature corresponds to that of the porphyrins. |