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Uroporphyrinogen

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Uroporphyrinogen decarboxylase


Uroporphyrinogens are cyclic tetrapyrroles with four propionic acid groups ("P" groups) and four acetic acid groups ("A" groups).

Contents

There are four forms, which vary based upon the arrangements of the "P" and "A" groups (in clockwise order):

  • In the "I" variety (i.e. uroporphyrinogen I), the order repeats four times: AP-AP-AP-AP.
  • In the "III" variety (i.e. uroporphyrinogen III), the fourth is reversed: AP-AP-AP-PA.
  • The "II" and "IV" varieties can be created synthetically, but do not appear in nature.

    • Uroporphyrinogen iii synthase physiology biochemistry and organic mechanism


    References

    Uroporphyrinogen Wikipedia
    (Text) CC BY-SA


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