Band heights, positions, and deviations for rat retinal cells, human brain tumor cells, and normal mouse brain tissue.

The heights and positions of the ECM bands are reasonably consistent over a range of biologically identical prepared samples. The retinal cells from the R28 cell lineage were all measured on the same day, but from different passages of the genetically identical cell line. Two measurements were performed per passage. The tumor cells were from a human glioblastoma cell culture. Measurements for these rapidly proliferating cells were performed over three days. For the cell suspensions, the average and standard deviation was calculated with all values treated as independent, identical measurements. The mouse spectra were collected from five animals over the course of two days. Three measurements were performed for each mouse. Shown is mean of means and standard deviation for the five animals. These results indicate this less intense amide III signal is above the signal to noise for the measurement. A larger number of N is required to determine if identical experiments produce values that are not statistically different from each other. Sh, shoulder.