Fig. 6

Cell binding assay of the silk spheres. Her2-positive cells (SKBR3) and Her2-negative cells (MSU1.1) were incubated with plain spheres composed of the control silk proteins MS1 and H2.1MS1 and with blended spheres (H2.1MS1:DOXMS2, H2.1MS1:MS2, and MS1:DOXMS2) prepared at an 8:2 weight ratio. a Representative graphs of the flow cytometry analysis. Nontreated cells were the control. b The mean percentage of silk sphere binding to cells (± SD) in three independent experiments is shown. *** indicates statistical significance with p < 0.001, **p < 0.01, and *p < 0.05