In order to make the correct number of bends in the collagen-like portion of the SP-D molecule diagram which I will use to overlay onto a TEM of one of the many published images of SP-D, i found that correspond to the glycine residues (in this image from RCSB PDB link that has a portion of a collagen molecule that can be viewed in 3D), and the comments on PDB-101,  can be used as markers for the angular notations in said diagram.

This is a relief, and i compared the G– sequences in full length collagen (of which there is an easy to count number of at least 360 (that i counted by hand) and a very small number by comparison (29) in the SP-D portion.  THus, i will put 29 bands in the diagram of SP-D which you will see is way less than the diagram of Girth Sorensen which I posted yesterday. which indicates there are 171 amino acids in the collagen-like domain. This is problematic, but here is the model of a collagen type triple helix I will use for the diagram.