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Question

Which of the following is not a component of downstream processing?

A
Preservation
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B
Expression
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C
Separation
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D
Purification
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Solution

The correct option is B Expression
Upstream Processing refers to the first step in which biomolecules are grown, usually by bacterial or mammalian cell lines express the gene product, in bioreactors. When they reach the desired density they are harvested and moved to the downstream section of the bioprocess.
This process starts with the separation of the cells from the gene product, then purification and preservation.

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