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myoglobin

myoglobin

3 8.3
A red protein in muscle that stores oxygen for use during activity
  • noun
  • /ˌmaɪəˈɡloʊbɪn/
  • Specialized
: mioglobina
  • Overloaded by the elevated levels of myoglobin, the kidneys can struggle, leading to renal failure in some severe circumstances.
  • myoglobin in muscle

Examples

  • Myoglobin is filtered by the glomerulus, initially appearing as casts.

    Academic text (2005)
  • Myoglobin is an oxygen-carrying protein that has an increased affinity for oxygen, more so than hemoglobin.

    Academic text (2005)
  • Myoglobin may also have a toxic effect on the kidneys.

    Academic text (2004)
  • It's in this same temperature range that the pigment myoglobin (which is what makes raw meat look red) denatures and turns grayish brown.

    Academic text (1999)
  • Myoglobin, a dark-red protein, makes the urine reddish-brown (Dayer-Berenson, 1994).

    Academic text (2005)
  • Myoglobin content in muscle tissue is approximately 0.3% (Dhawan, Jyothinagaram, & Schwartz, 2005).

    Academic text (2005)
  • In the presence of exertional muscle injury in Type II muscle fibers, myoglobin is released from muscle, subsequently entering the systemic circulation (Dhawan et al., 2005).

    Academic text (2005)
  • The high levels of myoglobin in red meat give it a darker color compared to white meat.

  • Athletes often have more myoglobin in their muscles, allowing them to perform better during endurance activities.

  • Deep-diving mammals such as Weddell seals have unusually high concentrations of myoglobin in their cells, and so do emperor penguins.

Surface Forms

myoglobin singular
myoglobins plural

Morphology

myoglobin = globin (opaque) = myo + globin + myo

Formed by the technical combining form 'myo-' (muscle) attached to 'globin' (a protein family); both elements are bound, technical morphemes unlikely to be recognized by an average B1 learner.

Etymology

The word myoglobin breaks into two parts: myo- meaning 'muscle' and globin from a word for a 'small round thing' like a globe. So myoglobin is a red protein in muscle that you can picture as tiny round balls that hold oxygen for the muscles.