haem

Etymology

noun

  1. Australia, Canada, Ireland, New Zealand, South Africa, and UK standard spelling of heme.
    Haem is ubiquitous, abundant and necessary for energy metabolism. Most bacteria have a haem biosynthesis pathway, but nevertheless, since haem is a major source of iron (an essential metal), microbes take up exogenous haem to retrieve iron. 2010, Pierre Cornelis, Simon Andrews (editors), Iron Uptake and Homeostasis in Microorganisms, page 17

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