There is no such thing as a solution of protein. Protein structures are broken down and analyzed by combining them in solutions of various conditions, such as super-heating or cooling them.

CovalX's motto is 'Solutions for Protein Complex Analysis'.

To test for protein.

Biuret or solutions of sodium hydroxide and copper sulfate.

Tested with a dropper a + result will be purple or something

Protein pumps

All solutions are mixtures but not all mixtures are solutions.

Milk is a Mixtures of protein, fat, lactose and minerals in the form of colloids.

Chocolate drink is a mixtures of suspense solid and milk (colloids) with sugar (solution).