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Concentration of IGF-I labeled with Cy5 dye as a function of position (x) from the solution/gel interface at different times. The fields of view shown are centered at x = 0.044 cm for position 1 and 0.087 cm for position 2 from the interface. For each image, 27 equispaced data points were plotted. The actual data set contains 512 data points from each of 10 images.
