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Hemocyanin

Hemocyanin --> haemocyanin

(Science: chemical) blue, oxygen transporting, copper containing protein found in the blood of molluscs and crustacea.

a very large protein with 20-40 subunits and molecular weight of 2-8 million and having a characteristic cuboidal appearance under the electron microscope. Prior to the introduction of immunogold techniques, it was used for electron microscopic localisation by coupling to antibody.


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Re: Blood is always red, never blue.

... creatures like the Horseshoe crab have blue blood, this is because they do not use hemoglobin to attract oxygen (iron based) but instead use hemocyanin (copper based) it must be a more efficent way of delivering oxygen to the cells as they have survived all the great extinctions

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by ablettakbar
Tue Oct 16, 2012 6:06 am
 
Forum: Human Biology
Topic: Blood is always red, never blue.
Replies: 57
Views: 364500

Theories - Origin of Life

... blood is colorless, it is based - gemovanady containing vanadium ions. In octopus, spiders, scorpions, crabs, respiratory pigment of the blood is hemocyanin, in which iron is present instead of copper (Cu2 +). Combines with oxygen of air is blue hemocyanin, and by giving oxygen to tissues - a ...

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by LeoPol
Mon Oct 10, 2011 8:30 am
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 559
Views: 755248

Re: Blood is always red, never blue.

It has to do with the fact that hemocyanin changes its colour right after it contacts the air, whilst hemoglobin, being intracellular, doesn't react instantly unlike someone wrote in a reply in this thread, where they claimed that venous ...

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by biohazard
Wed Apr 23, 2008 5:53 am
 
Forum: Human Biology
Topic: Blood is always red, never blue.
Replies: 57
Views: 364500

Re: Blood is always red, never blue.

... pigments need to be locked inside cells because it is too small and it would clog the excretion systems(be they nephridia, nephrons or whatever). Hemocyanin and other pigments are large enough to float around in the plasma/hemolymph with no ill effects on the excretory system.

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by MrMistery
Tue Apr 22, 2008 8:37 pm
 
Forum: Human Biology
Topic: Blood is always red, never blue.
Replies: 57
Views: 364500

Blood is always red, never blue.

The horseshoe crab has blue blood! These odd arthropods have copper-containing protein hemocyanin instead of hemoglobin, and it is indeed blue - although when oxygenated. Although this has nothing to do with human blood, it proves one point: someone earlier in this ...

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by biohazard
Tue Apr 22, 2008 1:11 pm
 
Forum: Human Biology
Topic: Blood is always red, never blue.
Replies: 57
Views: 364500
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