Arroyo’s publication on surfactant protein D certainly my favorite, and the supplemental figures shows images which confirm pretty clearly (in my own mind anyway) that there are 3 or 4 peaks between the N termini connections and the CRD. See below a portion of her image which i have cropped and added white arrows to pointing out how the peaks show up both in a lateral view and foreshortened view. Her figure showing the central diameter of the N termini and part of the collagen-like-domain is the black dotted line with black arrowheads.
This is a crop from her supplemental figure.
I am glad to have the supplemental figures to check out the size of the SP-D dodecamers and their brightness (LUT) plots and arm length using vector and node lines) and straightened molecules I have made with the cover images, against one of the supplemental figures which appears to be a similar area just rotated and cropped but actually has a micron bar marker (unlike the cover image legend which was gave the size in text, erroneously).