Determine techniques to characterize the structure

In a newly-explored deep-sea environment, several potentially new species of apparent bacteria have been discovered. In some of these single-celled life forms, a novel structure has been observed. The structure is apparently bound to the interior surface of the cell membrane and so does not float freely in the cytosol. Preliminary investigation indicates that this structure typically appears circular or ovoid in shape. It apparently consists of a long chain of nucleic acid wrapped around a tube of an unknown protein.

What approach would you use to isolate only cells that contain this new structure? What techniques could be used to characterize the structure and composition of the structure? How might you identify the type of protein and nucleic acid? What would you hypothesize to be the function of this structure? To what eukaryotic organelle might this structure be analogous and why?