Additional file 8: Figure S4. of A comparative study of chondroitin sulfate and heparan sulfate for directing three-dimensional chondrogenesis of mesenchymal stem cells Tianyi Wang Fan Yang 10.6084/m9.figshare.5722084.v1 https://springernature.figshare.com/articles/figure/Additional_file_8_Figure_S4_of_A_comparative_study_of_chondroitin_sulfate_and_heparan_sulfate_for_directing_three-dimensional_chondrogenesis_of_mesenchymal_stem_cells/5722084 Safranin-O staining of acellular hydrogels harvested on day 1. Scale bar = 200 μm. (TIF 8009 kb) 2017-12-19 05:00:00 Additional heparan sulfate cells Safranin-O staining chondroitin sulfate acellular hydrogels 4. mesenchymal chondrogenesi TIF 8009  kb Figure 1.