Multicellular organisms have specialized cells that exist in tissues that perform unique functions for the organism. For example, you have cells in your intestine that absorb nutrients and cells in your blood that fight infections. What is responsible for the differences between these different types of cells? • The cells possess different sequences in their DNA The cells possess unique lipids The cells possess unique carbohydrates The cells possess unique genomes The cells possess different proteins

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Proteins

We generally tend to think of proteins only from a dietary lens, as a component of what we eat. However, they are among the most important and abundant organic macromolecules in the human body, with diverse structures and functions. Every cell contains thousands and thousands of proteins, each with specific functions. Some help in the formation of cellular membrane or walls, some help the cell to move, others act as messages or signals and flow seamlessly from one cell to another, carrying information.  

Protein Expression

The method by which living organisms synthesize proteins and further modify and regulate them is called protein expression. Protein expression plays a significant role in several types of research and is highly utilized in molecular biology, biochemistry, and protein research laboratories.