You have just obtained the 3d structure of a newly discovered protein. when you investigate it on the computer, you find that it has 10 alpha helix that are form a ring. further, you realize that there are two protein chains in the folded structure of the protein and that each contributes 5 helix to the final structure. when you run into your lab partner later, you tell them that the protein has all levels of protein structure up to __________________ structure.