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单词 haem
释义

haem

/hiːm /
(US heme)
noun [mass noun] Biochemistry
An iron-containing compound of the porphyrin class which forms the non-protein part of haemoglobin and some other biological molecules.This turnover releases significant amounts of the iron-free portion of heme, porphyrin, which is subsequently degraded....
  • The majority of photosensitizers are derivatives of hematoporphyrin, a synthetic porphyrin synthesized from heme.
  • The active site or prosthetic group of all the cytochromes is an iron containing porphyrin, or heme.

Origin

1920s: back-formation from haemoglobin.

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更新时间:2024/12/24 8:14:16