Figure 1From: Quantitative proteomic analysis of sphere-forming stem-like oral cancer cellsA subset of UM1 oral cancer cells were spherogenic when cultured in serum-free medium containing growth factors bFGF and EGF for three to four weeks (A). A close-up of the spherogenic cancer cells is shown in (B). bFGF, basic fibroblast growth factor; EGF, epidermal growth factor.Back to article page