Before revision: The polyacrylamide and PDMS in particular come into handy because they let scientists specifically regulate the stiffness of the substrate, and interestingly they allow researchers to measure cellular forces (traction force microscopy).
After revision: The polyacrylamide and PDMS in particular come into handy because they let scientists specifically regulate the stiffness of the substrate, and they allow researchers to measure cellular forces (traction force microscopy).