IMMUNOLOGY

IMMUNOGLOBULINS

COMPLEMENT SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Why is there an enzyme attached to the secondary antibody?
A
They link to the proteins used
B
The catalyze reactions
C
They provide a colormetirc indication of antigen exposure
D
They are used to detect DNA
Explanation: 

Detailed explanation-1: -The primary antibody detects the antigen in the specimen, but the secondary antibody can be designed to have a fluorophore or enzyme complex attached to it for the purposes of visualization.

Detailed explanation-2: -The secondary antibody is conjugated with an enzyme because it shows the concentration, The enzyme substrate reaction shows a color change, which again shows how many antibodies are present. Disease samples were collected from two patients and subjected to serial dilutions before running an ELISA.

Detailed explanation-3: -Why are enzymes used in this immunoassay? Enzymes provide a way to see whether the primary antibody has attached to its target (antigen) in the microplate well. Primary and secondary antibodies are invisible, so a detection method is necessary. The enzyme HRP is linked to the second antibody.

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