It is easy to see that there is a definite width variation in at least three different places. Center N terminus peak is not the widest, though it is the tallest “Lightness” or “luminance” peak. The CRD (four outside areas are the largest in terms of width, but not the tallest but next tallest and it is the greatest in square nm (in this image, each being about 200 nm² while the N terminus is about 100 nm²).  I guess at some point someone needs to do area under the curves for both width and height and get a total nm for each of the regions.  It seems that there are three peaks and also a little blip for the area just before the CRD (presumably the coiled coil neck region, that means four peaks between the N terminus and CRD.  And sometimes it looks like 5.

Nm grid overlying area of the N terminus and CRD shown below.  The nm of the largest peak between (and next to N terminus) and CRD is something about half the size of the N terminus nm².