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Myoglobin

myoglobin

(Science: physiology) protein (17.5 kD) found in red skeletal muscle. It was the first protein for which the tertiary structure was determined by x-ray diffraction, by J.C.Kendrew's group working on sperm whale myoglobin.

It is a single polypeptide chain of 153 amino acids, containing a haem group bonded via its ferric iron to two histidine residues. It binds oxygen noncooperatively and has a higher affinity for oxygen than haemoglobin at all partial pressures. In capillaries oxygen is effectively removed from haemoglobin and diffuses into muscle fibres where it binds to myoglobin which acts as an oxygen store.


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Re: The Effect of pH on the Plant Cell Membrane

Sorry. :oops: Could have sworn it said "meat", but clearly it says "beet". My mistake; and all that stuff about myoglobin isn't relevant. But I still don't quite understand what exactly was done--be it beet or meat slices.

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by blcr11
Wed Oct 08, 2008 5:24 pm
 
Forum: Molecular Biology
Topic: The Effect of pH on the Plant Cell Membrane
Replies: 6
Views: 2451

Re: The Effect of pH on the Plant Cell Membrane

... is probably what you meant to say in the title, I would guess. The red pigment in red meats comes mostly from a hemoglobin-like molecule called myoglobin. Myoglobin is the intracellular oxygen carrier and doesn't circulate like hemoglobin does with the RBCs. So long as the muscle cell membranes ...

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by blcr11
Wed Oct 08, 2008 1:00 pm
 
Forum: Molecular Biology
Topic: The Effect of pH on the Plant Cell Membrane
Replies: 6
Views: 2451

Re: human body cell

... long time without tiring (such as muscles that support your posture) have many mitochondria (iirc) and lots of certain enzymes. Also the amount of myoglobin is different between muscles. Whether this comparison works in practise, I have no idea. The differences could be too subtle, or the they ...

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by biohazard
Mon Jan 07, 2008 8:56 am
 
Forum: Cell Biology
Topic: human body cell
Replies: 5
Views: 1653

Protein sequencing and amino acids

If every protein is composed of a specific sequence of amino acids, how is it that the protein myoglobin in humans has a different sequence than the protein myoglobin in horses?

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by rikajaj
Sat Sep 15, 2007 4:38 am
 
Forum: Genetics
Topic: Protein sequencing and amino acids
Replies: 2
Views: 1083

The Fiber Disease

... Methods of Molecular Biology 236: 395-414. *Work supported in part by the NSF-MRSEC program [R1.074] Determination of Fe-CO bond energy in Myoglobin by transient grating spectroscopy Raicu V. (Departments of Chemistry and Physics, University of Toronto, Canada), Walther M. (Physikalisches ...

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by Nadas Moksha
Sun Dec 10, 2006 11:03 am
 
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 750122
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