DNA RNA and PNA?

I know basically that rna is the basis or the creation of dna, and now there is a process of grafting synthetic dna onto the double helix, this synthetic form of dna is referred to as PNA, does anyone know much (or anything) about pna? i was really wondering how they could graft it to the helix.

Thread moved here from the Proposed New Topics forum.

Do you mean replacing one strand in the DNA double helix with one strand of PNA?First of all, the helix is not some superstructure to which the molecules making up DNA are attached. Rather, that structure is the result of the shape the molecules take as they bind to each other.However, in terms of attaching a strand of PNA to DNA, I presume it would be similar to how two DNA strands combine to form the double helix--hydrogen bonding of the bases and generally complementary base pairs (although mismatches are possible).If I recall correctly, it is the hydrogen bonding that is actually responsible for the double helix shape.Here's the wiki article:
Peptide nucleic acid - Wikipedia