porphobilinogen

noun
por·​pho·​bi·​lin·​o·​gen | \ ˌpȯr-fō-bī-ˈlin-ə-jən How to pronounce porphobilinogen (audio) \

Medical Definition of porphobilinogen

: a dicarboxylic acid C10H14N2O4 that is derived from pyrrole, that is found in the urine in acute porphyria, and that on condensation of four molecules yields uroporphyrin and other porphyrins

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