Accurate micron markers are difficult.

After measuring over 40 SP-D molecules from two different figures, actually measuring each molecule three times (once as diameter touching three of the four dodecamer CRD, and once as the corrected liner dimension of each of the two arms CRD to CRD) using the provided micron marker…. these are different “The t-value is 5.73389. The p-value is < .00001. The result is significant at p < .05." I didn't even bother comparing the cover images which are grossly bigger than the molecules in these two figures. THIS IS WHY THE SIZE must be given a reasonable and standard size for each trimer.... Othewise peak height obtained with LUT plots, and positions (and even peak number) cannot be measured. Official difference between the cover dodecamers (arroyo et al) and the mean of all those dodecamers found in figures 1, 3 and 6 is considerable. One needs to reduce the cover dodecamers by 80.70%. Even though the difference between dodecamers in figures 1 and 6 is significantly different.... these were not adjusted one to the other since it was not possible to tell which was most accurate.