Using Cobalt RID I have searched for anything similar to human surfactant protein D. I am sure many others have done similar searches.  What I gleaned from this is that having atomic force microscopy on one (any) of those species with an extended collagen like domain will show whether the three (possibly four) brightness peaks along the collagen like domain are functional (duh) and relevant to the formation multimers.  That said I will list those species (common name and species name) below — which will take some time.