Biochem Protein What Are The Areas Of Aa's Within Proteins That Structurally And Functionally Play A Specific Role.?

What are the areas of aa's within proteins that structurally and functionally play a specific role.? - biochem protein

Within the regions of proteins are amino acids that play a special role both structurally and functionally, and those sections of the protein is called ______.

Thank you guys for your help. I'm dusting off after the failed Biochem science courses for more than 7 years.