Viability of the cells encapsulated in PEGDA gel.

<p>Representative images of live (green) and dead (red) 4T1 cells encapsulated in PEGDA gels with 5 kPa modulus and cultured in stem cell culture medium for 2 (a), 6 (b) and 12 (c) days. Cells were stained with cAM/EthD for live (green) and dead (red) cell imaging. The insets in (a) to (c) are live/dead images of 4T1 cells in PEGDA gels with 70 kPa modulus after 2, 6, and 12 (day), respectively.