urinary excretion of porphyrin precursors delta-aminolevulinic acid ( ala ) and porphobilinogen ( pbg ) and total porphyrins was measured during intoxication of rats with 2,4-dithiobiuret ( dtb ) , a chemical which produces delayed-onset neuromuscular weakness , in an attempt to ascertain whether or not dtb poisoning in the rat would serve as an animal model of the neurologic symptoms of acute intermittent porphyria .
C2917401
porphyrin precursors
C0002563
delta-aminolevulinic acid