Something similar to protein creation is a bakery in the time of corona. The owner of the bakery orders ingredients for a sweet or bread, the company will make the ingredients for whatever treat they are making. The company will receive the money, then the ingredients will be carried out in delivery, to the very same bakery that ordered it. The bakery will receive the ingredients and start to make all the different treats they can from them. After preparing them, somebody orders the treats. The bakery sends out the treats in boxes. The boxes will be sent out through vehicles to your house. You pay and then get the treats, however most of those treats will stay in the shop and be used for different purposes. As they can be used later to make different treats or to eat there.
The factory that could be making the ingredients.
The suppliers on their way to deliver the ingredients to the bakery.
The Bakery where the ingredients could be delivered and is modified into sweets. Before being transferred.
One of the places that the finished product is delivered.