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Classify antigens based on origin....

Classify antigens based on origin.

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On the basis of origin ,antigens are classified into ecogenous antigens and endogenous antigens.
The antigens which enter the host from the outside in the form of microorganisms,pollens drugs ,or pollutants are called exogenous antigens.The antigens which are formed within the individual are endogenous antigens.The best examples are group antigens.
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