Localization and abundance of composition signatures in non-treated REF52 cells.

The abundance of each signature is shown as the percentage of pixels with that signature from all the clustered pixels of the non-treated cells in a given labeling set. The localization of the signatures in stress-fibers (SF) and adhesion sites (AD), or their absence from these structures (---), is indicated. Asterisks indicate letter-number combinations that do not correspond to a defined signature (according to Fig. 3), or that correspond to signatures defined as noise (see Fig. 3).