This image (originally from Arroyo et al supplemental figure 4B) has been processed to the limits using four programs: Photoshop, CorelDRAW, ImageJ, and Gwyddion.  It has been converted from screen shot to jpg to tiff to png with who knows what algorithms, and I have adjusted the contrast in photoshop and exported to tif and opened as RGB in Gwyddion, and >basic operations>volumized in gwyddion (bottom image) to count peaks along each of the trimers, and compared with an additional contrast enhancement in photoshop.  And in this particular unique dodecamer (where the N termini of the hexamers are joined side by side instead of the more often found end to end through a central point) there is this cute little tiny peak before the first large peak (which has commonly been called the glycosylation site.  (see in three (marked, but probably all) of the four trimers the red circle identifying this small brighness (luminance) peak between the N termini and the major 1st peak along the arms) – top image) and all four trimers show this tiny peak in the volumized image (red circles in the bottom image).

In addition, it is clear from the contrast enhanced (by photoshop manipulation) that there is a declination present in the peaks nearest the CRD.