I have had a lot of fun with this website Phyre.  I have entered at least 2 dozen sequences into this program in an effort to figure out how different the SP-A might be among the species that I have been investigating with TEM for a couple years now.

Below is a photograph which i modeled the carbohydrate recognition domains and neck regions to compare.  Hey are remarkably similar, just a few juts and points are different. When i modeled the entire sequence, the neck region got deleted from dog.