U.S. CitiesCity-Data Forum Index
Go Back   City-Data Forum > General Forums > Health and Wellness
 [Register]
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
View detailed profile (Advanced) or search
site with Google Custom Search

Search Forums  (Advanced)
 
Old 02-18-2013, 04:40 PM
 
Location: 60630
11,635 posts, read 17,044,904 times
Reputation: 10632

Advertisements

I understand that our blood get its red color because it carries the protein hemoglobin. But then we also have oxy-hemoglobin, this is when hemoglobin binds to an oxygen molecule.

What is the difference then between hemoglobin and oxy-hemoglobin. If hemoglobin is already carries oxygen then what is oxy-hemoglobin.

I am sure I am over thinking this.
Reply With Quote Quick reply to this message

 
Old 02-18-2013, 06:17 PM
 
Location: Georgia, USA
21,498 posts, read 26,102,510 times
Reputation: 26471
Think of hemoglobin as four folded protein baskets linked together. At the center of each basket is a heme molecule containing an iron atom. Oxygen binds to the iron. The oxygen binding is reversible, so the hemoglobin molecule can pick up oxygen in the alveoli of the lungs and dump it out at the tissues that need it.

When oxygen is not attached to the hemoglobin, you have just plain hemoglobin. When the oxygen is attached, you have oxyhemoglobin.

RCSB PDB-101
Reply With Quote Quick reply to this message
 
Old 02-18-2013, 06:45 PM
 
Location: 60630
11,635 posts, read 17,044,904 times
Reputation: 10632
Thanks,

But isn't hemoglobin red because it is attached to the Oxygen? If Oxygen is not attached, how can it still be red. I guess that is my biggest hangup.
Reply With Quote Quick reply to this message
 
Old 02-18-2013, 06:51 PM
 
Location: 60630
11,635 posts, read 17,044,904 times
Reputation: 10632
When blood picks up Oxygen, it becomes the pigment in blood called hemoglobin? ( red ) ,

So if blood does not pick up Oxygen it is still red, right?
Reply With Quote Quick reply to this message
 
Old 02-18-2013, 07:02 PM
 
Location: Georgia, USA
21,498 posts, read 26,102,510 times
Reputation: 26471
Hemoglobin is red whether or not the oxygen is attached.

Oxyhemoglobin is bright red. Deoxyhemoglobin is dark red.

Is Deoxygenated Human Blood Blue?

Edited to add: The "hem" part of hemoglobin refers to the molecule to which the iron atom is attached. The "globin" part of the word refers to the four protein molecules. Thus we get "hemoglobin." So hemoglobin is a complex molecule which happens to be red. The red tint actually comes from the heme component.

Last edited by suzy_q2010; 02-18-2013 at 07:11 PM..
Reply With Quote Quick reply to this message
 
Old 02-18-2013, 07:35 PM
 
Location: 60630
11,635 posts, read 17,044,904 times
Reputation: 10632
Quote:
Originally Posted by suzy_q2010 View Post
Hemoglobin is red whether or not the oxygen is attached.

Oxyhemoglobin is bright red. Deoxyhemoglobin is dark red.

Is Deoxygenated Human Blood Blue?

Edited to add: The "hem" part of hemoglobin refers to the molecule to which the iron atom is attached. The "globin" part of the word refers to the four protein molecules. Thus we get "hemoglobin." So hemoglobin is a complex molecule which happens to be red. The red tint actually comes from the heme component.

Oh, ok. Thanks. Now I get it. Thanks for your help!
Reply With Quote Quick reply to this message
 
Old 02-18-2013, 08:30 PM
 
Location: Georgia, USA
21,498 posts, read 26,102,510 times
Reputation: 26471
You're welcome!
Reply With Quote Quick reply to this message
Please register to post and access all features of our very popular forum. It is free and quick. Over $68,000 in prizes has already been given out to active posters on our forum. Additional giveaways are planned.

Detailed information about all U.S. cities, counties, and zip codes on our site: City-data.com.


Reply
Please update this thread with any new information or opinions. This open thread is still read by thousands of people, so we encourage all additional points of view.

Quick Reply
Message:

Over $104,000 in prizes was already given out to active posters on our forum and additional giveaways are planned!

Go Back   City-Data Forum > General Forums > Health and Wellness
Similar Threads
Follow City-Data.com founder on our Forum or

All times are GMT -6.

2005-2018, Advameg, Inc.

City-Data.com - Archive 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35 - Top