ISSN 2398-2977      

Blood: biochemistry - total protein


Synonym(s): TP


  • Composed of albumin and globulin fractions. See albumin   Blood: biochemistry - albumin  , gamma globulins   Blood: biochemistry - gamma globulins  .
  • Globulin   Blood: biochemistry - total globulin  fraction = alpha, beta and gamma sub-fractions. May be further separated into alpha-1, alpha-2, beta-1 and beta-2   Blood biochemistry: total globulin - normal electrophoresis scan  .
  • Absolute changes in albumin and globulin associated with wide range of clinical conditions.
  • Electrophoresis: separation of globulin sub-fractions provides further information   Blood biochemistry: total globulin - normal electrophoresis scan  .


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  • Biuret: standard method.
  • Calibrated refractometer: for rapid result.
  • Electrophoresis: followed by scanning with densitometer to quantify individual globulin subfractions.


  • Biuret: widely available.
  • Refractometer: widely available.
  • Electrophoresis: commercial laboratories, widely available.



  • Biuret: accurate except at low levels (<10 g/l).
  • Colorimetric method: a colored complex is formed between protein and cupric ions in an alkaline medium.
  • Refractometer: generally satisfactory for clinical purposes.

Technique (intrinsic) limitations

  • Usually must be interpreted in conjunction with other laboratory and clinical findings to reach a diagnosis.

Technician (extrinsic) limitations

  • Electrophoresis.
  • Biuret.
  • Refractometer.

Result Data

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Further Reading


Refereed papers

Other sources of information

  • Kaneko J J, Harvey J W & Bruss M L (1997) Eds. Clinical Biochemistry of Domestic Animals. 5th edn. Academic Press, USA.


  • Veterinary commercial laboratories, State diagnostic laboratories or Veterinary College laboratories.

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