the action of porphyrins , uroporphyrin i and iii ( uro i and uro iii ) , pentacarboxylic porphyrin i ( penta i ) , coproporphyrin i and iii ( copro i and copro iii ) , protoporphyrin ix ( proto ix ) and mesoporphyrin ( meso ) , on the activity of human erythrocytes delta-aminolevulinic acid dehydratase , porphobilinogenase , deaminase and uroporphyrinogen decarboxylase in the dark and under uv light was investigated .
C0032712
porphyrins
C0033733
protoporphyrin ix