The process of separation and purification of expressed protein formed in heterologous host before marketing is called

The processes involved in separation, extraction, isolation, purification and formulation of expressed protein product before marketing is called downstream processing.

(2) The processes involved in obtaining desired products using complete living cells or their components (bacteria, enzymes, chloroplasts) is known as bioprocessing. It has two major steps, namely upstream bioprocessing and downstream bioprocessing.

(3) Post-production processing refers to the last step of downstream processing, which involves purification, stabilisation and formulation of the product. 

(4) The two main segments of bioprocessing are upstream bioprocessing and downstream bioprocessing. The
upstream part involves the early stages of bioprocessing, identifying the organism to be produced, optimising the conditions it requires to grow, and then growing and collecting this organism. It is followed by scaling up the production process and downstream processing.