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denWhat would be a reasonable alternative to iron in blood? Would cobalt or manganese work? What colour would the blood be?
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Date: 23 Jan 2003 04:29 (UTC)I was going to suggest copper as well but someone else beat me to it.
Other options are zinc, mercury, chromium, manganese, cobalt and cadmium. Of course, all these are toxic in normal human beings if they replace the ferrohemoglobin. Copper in particular aids in the absorption of iron into hemoglobin, so that would be a primary choice, but where the other metals are concerned, if they are present in the system in amounts that cannot be filtered (i.e. acute poisoning) they will start replacing iron in the blood.
Does it have to be a metal? It could easily be nitrite or a cyanidate compound..