The cellular structure responsible for packaging proteins for transport out of the cell is the Golgi apparatus. This structure was identified by Italian scientist Camillo Golgi in 1897 and officially named after him a year later.
The Golgi apparatus is a part of the endomembrane system within a cell's structure. By properly packaging proteins before the cells send them on their way to their different destinations, this component is a very important part of the secretion process.
Due to its relatively large size, the Golgi apparatus was one of the first organelles to be identified, examined in detail, and given a name. Although many people at first did not believe the identification of the structure, thinking it to be an optical illusion that stemmed from the particular observation techniques known to be used by the scientist, the development of more advanced and sensitive microscopes in the 20th century at last confirmed the existence of the structure and its purpose.
This cellular structure is found in both plant and animal cells. It is comprised of stacks of structures bound in membranes. These are referred to as cisternae. The proteins progress through four distinct regions within the stacks so that they can be packaged and sent along their way.