Molecular interactions are important to molecular biologists because:
1. They help us to understand a protein's function and behaviour (Figure 2).
2. They can help us to predict the biological processes that a protein of unknown function is involved in:
- We may assume “Guilt by association” if a protein of unknown function associates with one of known function
- Proteins involved in the same process should cluster together in network maps
Figure 2. Contrary to the original belief that one protein had a single function, proteins have different functions and cellular roles depending on their immediate environment, which has an impact on their position in protein networks.