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What would be a reasonable alternative to iron in blood? Would cobalt or manganese work? What colour would the blood be?

Date: 23 Jan 2003 01:40 (UTC)
From: [identity profile] bookofnights.livejournal.com
Horseshoe crabs have copper based blood. It's blue/green (http://www.beach-net.com/horseshoe/Bayhorsecrab.html) in color. (The last fact on the page.)

Date: 23 Jan 2003 03:23 (UTC)
From: [identity profile] dewhitton.livejournal.com
Brilliant! Thanks!

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