while the measurements of the activity of the defective enzyme ( uroporphyrinogen decarboxylase ) for the genetic research of pct turned out to be impracticable in hepatic tissue and contradictory in erythrocytes , our study confirms that the familial character of this disease may be revealed by the chromatographic analysis of the porphyrin excretion pattern .
C0042085
uroporphyrinogen decarboxylase
C0162566
pct