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Haemoglobin

Haemoglobin

(Science: cell biology, haematology) Four subunit globular oxygen carrying protein of the erythrocytes of vertebrates and some invertebrates.

It is a conjugated protein containing four haem groups and globin. There are two alpha and two beta chains (very similar to myoglobin) in adult humans, the haem moiety (an iron containing substituted porphyrin) is firmly held in a nonpolar crevice in each peptide chain.

there are four globin polypeptide chains, designated alpha, beta, gamma, delta in the adult. Each is composed of several hundred amino acids. A hemoprotein composed of globin and heme that gives [[red Blood cells]] their characteristic color; function primarily to transport oxygen from the lungs to the body tissues; fish have simpler hemoglobin than mammals.The oxygen carrying substance found in blood that can carry up to 4 molecules of oxygen at a time.


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Re: oxygen "grabbers" haemoglobin adaptation?

To a Chemical Engineer like me (retired) the term "oxygen grabber" can mean chemicals like hemoglobin, or wet iron used to remove atmospheric oxygen in lab work, or even the presence of such materials in the workplace which may pose an industrial hazard (like the inside of a rusting steel...

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by animartco
Sat Aug 31, 2013 2:54 pm
 
Forum: General Discussion
Topic: oxygen "grabbers" haemoglobin adaptation?
Replies: 7
Views: 5718

Re: oxygen "grabbers" haemoglobin adaptation?

To a Chemical Engineer like me (retired) the term "oxygen grabber" can mean chemicals like hemoglobin, or wet iron used to remove atmospheric oxygen in lab work, or even the presence of such materials in the workplace which may pose an industrial hazard (like the inside of a rusting steel ...

See entire post
by DDD
Wed Aug 07, 2013 12:35 pm
 
Forum: General Discussion
Topic: oxygen "grabbers" haemoglobin adaptation?
Replies: 7
Views: 5718

Re: carbon dioxide and haemoglobin

Carbon dioxide combines reversibly with haemoglobin to form carbaminohaemoglobin. Carbon dioxide does not bind to iron, as oxygen does, but to amino groups on the polypeptide chains of haemoglobin. Thanks a lot. John Messick

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by JohnMessick
Mon Jan 23, 2012 4:26 pm
 
Forum: General Discussion
Topic: carbon dioxide and haemoglobin
Replies: 5
Views: 1875

carbon dioxide and haemoglobin

... but my textbook says that carboxyhemoglobin is formed they are both referring to the transport of carbon dioxide (the way that CO2 combines with haemoglobin)

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by bryanwong
Mon Jan 09, 2012 7:14 am
 
Forum: General Discussion
Topic: carbon dioxide and haemoglobin
Replies: 5
Views: 1875

carbon dioxide and haemoglobin

which is formed when carbon dioxide combines with haemoglobin(some carbon dioxide is carried by haemoglobin)? my textbook says that, carboxyhemoglobin is formed ,but i found that carbaminohemoglobin is formed instead on the internet . which one is ...

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by bryanwong
Sat Jan 07, 2012 9:48 am
 
Forum: General Discussion
Topic: carbon dioxide and haemoglobin
Replies: 5
Views: 1875
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