单词 | uroporphyrin |
释义 | uroporphyrin [¦yu̇r·ǝ`pȯr·fǝ·rǝn] BIOCHEMISTRY Any of several isomeric, metal-free porphyrins, occurring in small quantities in normal urine and feces; molecule has four acetic acid (-CH2COOH) and four propionic acid (-CH2CH2COOH) groups. |
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