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单词 haem
释义

Definition of haem in English:

haem

(US heme)
noun hiːmhēm
mass nounBiochemistry
  • An iron-containing compound of the porphyrin class which forms the non-protein part of haemoglobin and some other biological molecules.

    〔生化〕血红素

    Example sentencesExamples
    • 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.
    • An iron porphyrin, called heme, is the portion of hemoglobin that carries oxygen from the lungs to our body's cells.
    • The harvested cell pellet was red, which suggested that the prosthetic group heme was synthesized by the bacterium.

Origin

1920s: back-formation from haemoglobin.

Definition of heme in US English:

heme

(British haem)
nounhēm
Biochemistry
  • An iron-containing compound of the porphyrin class which forms the nonprotein part of hemoglobin and some other biological molecules.

    〔生化〕血红素

    Example sentencesExamples
    • The harvested cell pellet was red, which suggested that the prosthetic group heme was synthesized by the bacterium.
    • An iron porphyrin, called heme, is the portion of hemoglobin that carries oxygen from the lungs to our body's cells.
    • 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.
    • This turnover releases significant amounts of the iron-free portion of heme, porphyrin, which is subsequently degraded.

Origin

1920s: back-formation from hemoglobin.

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