Dictionary » M » 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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Muscle Fiber Types are FICTIONAL, or is it not?

... it increases size as well). On the other side (for endurance training), body requires more oxygen, which comes with capacity of capillaries, myoglobin and mitochondria. Mitochondria also provides energy/ATP. Therefore, there are but one muscle fiber, which change because of required adaptation. ...

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by GPiklaov
Thu May 16, 2013 2:31 pm
Forum: Human Biology
Topic: Muscle Fiber Types are FICTIONAL, or is it not?
Replies: 0
Views: 1714

Aerobic respiration

Explain, in general terms, aerobic cellular respiration as it takes place in a skeletal muscle, and describe the role myoglobin plays in this reaction.

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by AlysseAllarie
Fri Jan 07, 2011 3:31 am
Forum: Human Biology
Topic: Aerobic respiration
Replies: 1
Views: 1600

Change in distal his in hemoglobin

... structural features that are directly related to this function. Furthermore, we have discussed the importance of the distal His (His64) in myoglobin with respects to carbon monoxide binding. Hemoglobin subunits also each have a distal His (His58 for α and His63 for β) that functions in ...

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by tntran
Fri Oct 16, 2009 3:09 pm
Forum: Molecular Biology
Topic: Change in distal his in hemoglobin
Replies: 1
Views: 1957


... genes are produced by several mechanisms which include gene duplication, random mutations, promoter mutations and etc. For example, hemoglobin and myoglobin are both proteins in our blood that carry oxygen but deliver that oxygen under different conditions. Hemoglobin delivers that oxygen as needed ...

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by MolecularBioFTW
Wed Sep 30, 2009 5:50 pm
Forum: Evolution
Topic: Natural selection is proven wrong
Replies: 247
Views: 620215

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: 19458
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