Fecal porphyrin
There are two main isomers of porphyrins, namely type Ⅰ and type Ⅲ. Porphyrins are fecal porphyrin and uroporphyrin, which belong to four hydroxyl compounds. After erythrocytes are destroyed by aging, hemoglobin is removed from globin Remaining heme, heme is a porphyrin after removing iron atoms.
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