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. 2006 Apr 7;91(1):113–121. doi: 10.1529/biophysj.105.080192

FIGURE 1.

FIGURE 1

Physiological ranges of flow velocities and diffusion coefficients result in biased cell-secreted morphogen gradients. Typical concentration contours show the trend toward biased gradients as either velocity is increased or the diffusion coefficient of the secreted protein is decreased. This biasing occurs for low Peclet numbers (Pe < 1).