https://www.selleckchem.com/EGFR(HER).html
Porphyrias are a group of congenital errors in porphyrin metabolism and in the heme biosynthetic pathway. Accumulation of porphyrin precursors (delta-aminolaevulinic acid and porphobilinogen) is responsible for the neurovisceral crises of acute porphyria, which, when expressed clinically, start with intense abdominal pain. During crises, the urinary elimination of porphobilinogen and delta-aminolaevulinic acid is always very high. Excessive porphobilinogen concentration in urine is easily identified using the simple Hoesch test. A negative tes
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