Quantitative parameters used to describe the dynamic distribution of FGF molecules along the assay length.

The spatial positions of Segment-I, Segment-II, and Segment-III are shown along microchannel length, x, measured in mm. Average values of the FGF gradient fields, G, in each segment are calculated in (ng/mL per mm of channel). The average range, R, and average percentage change in FGF concentration, μC, are shown in respective units of (ng/mL) and percent. The average time rate of change of gradient fields, GTRC, is shown in units of (ng/mL per mm) per hour.