The calibrators included coproporphyrin III dihydrochloride, uroporphyrin III dihydrochloride, 2-vinyl-4-hydroxymethyl deuteroporphyrin IX dihydrochloride, deuteroporphyrin IX, protoporphyria IX, and a porphyrin marker kit containing a mixture of uroporphyrin, coproporphyrin, and hepta-, hexa-, and pentacarboxylic acid porphyrins of the I isomer series.
The plasma porphyrins in samples from patients with VP were normal or showed a slight increase of uroporphyrin III.
We found a greater increase of plasma uroporphyrin I compared with uroporphyrin III in renal failure, similar to the reports of Seubert et al.