Functions do proteins control
The amino acids that form a protein interact with each other, and thosecomplex interactions give each protein its own specific, three-dimensional structure. That structure in turn determines how a protein functions and what other molecules it impacts.
Common types of proteins are:
- Enzymes, which put molecules together or break them apart.
- Signaling proteins, which relay messages between cells, and receptors, which receive signals sent via proteins from other cells.
- Immune system proteins, such as antibodies, which defend against disease and external threats.
- Structural proteins, which give shape to cells and organs