A fibrinogen peak between the β- and γ-globulins on a protein electrophoresis pattern indicates which type of sample?

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Multiple Choice

A fibrinogen peak between the β- and γ-globulins on a protein electrophoresis pattern indicates which type of sample?

Explanation:
Fibrinogen is present in plasma but is removed when blood clots to form serum. On protein electrophoresis, a fibrinogen peak appearing between the β- and γ-globulin regions indicates this protein is still in the sample, meaning the sample is plasma (not serum). Urine and CSF contain little protein and would not show a fibrinogen band, so the presence of this peak specifically points to plasma.

Fibrinogen is present in plasma but is removed when blood clots to form serum. On protein electrophoresis, a fibrinogen peak appearing between the β- and γ-globulin regions indicates this protein is still in the sample, meaning the sample is plasma (not serum). Urine and CSF contain little protein and would not show a fibrinogen band, so the presence of this peak specifically points to plasma.

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