Fig. 5.
Aligned monodomain PA gels. A) Birefringence images of two aligned PA noodles, showing light extinction at the crosspoint. B) Scanning electron microscopy (SEM) image of aligned bundles. C) Phase image of human mesenchymal stem cells (hMSCs) preferentially aligned along the string axis. D) Fluorescence image of calcein-stained hMSCs cultured in the aligned PA gel. Reproduced with permission from reference 76.