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. Author manuscript; available in PMC: 2016 May 1.
Published in final edited form as: Integr Biol (Camb). 2015 Apr 24;7(5):569–579. doi: 10.1039/c5ib00060b

Fig. 6.

Fig. 6

Increasing the concentration range, while maintaining the gradient slope, reveals similar chemotactic behavior in myoblasts above a threshold concentration. The top panel of angular histograms illustrates the distribution of myoblasts after exposure to the corresponding bFGF gradient for 14 h when the device source and sink are perfused with 11 and 0 ng/mL bFGF, respectively. The bottom panel illustrates the distribution of myoblasts after 14 h when the device source and sink are perfused with 16 and 5 ng/mL bFGF, respectively. The gradient slopes are identical between the top and bottom panels. The number of individual cells tracked (n), and the p-value calculated using the Rayleigh Test for Vector Data (p) are shown. Red labels denote histograms with statistically significant asymmetry (p <0.05).