Proteins are a large, highly diverse group of macromolecules that occur in a vast array of shapes and sizes. These miniscule molecular workhorses are ubiquitous — they’re present in all known living organisms!

  Proteins have a huge variety of functions as transporters, messengers, enzymes, and many more.

  Aside from their crucial roles in the human body, proteins are also essential to other organisms such as viruses. The global COVID-19 pandemic provides an example of a protein crucial to the spread of this disease — spike protein.