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84kDa

CPK is an enzyme that catalyzes the conversion of creatine into phosphocreatine using ATP. Phosphocreatine is utilized an an energy reservoir in tissues with high usage of ATP such as muscles, spermatozoa, photoreceptors of the retina and hair cells of the inner ear. It is also used as a laboratory marker of muscle issue damage (rhabdomyolysis).

References

Wikipedia contributors. "Renin". Wikipedia, The Free Encyclopedia. Accessed March 8 , 2020. https://en.wikipedia.org/wiki/Creatine_kinase

Previous Posts in this Series

Today's Human Body Molecule #1: Urea

Today's Human Body Molecule #2: Creatinine

Today's Human Body Molecule #3: Carbon dioxide

Today's Human Body Molecule #4: Glucose

Today's Human Body Molecule #5: Adrenaline

Today's Human Body Molecule #6: Noradrenaline

Today's Human Body Molecule #7: Dopamine

Today's Human Body Molecule #8: Bicarbonate

Today's Human Body Molecule #9: Adenosine

Today's Human Body Molecule #10: Acetylcholine

Today's Human Body Molecule #11: Serotonin

Today's Human Body Molecule #12: Aldosterone

Today's Human Body Molecule #13: Angiotensin II

Today's Human Body Molecule #14: Renin

Today's Human Body Molecule #15: Hemoglobin