Discussion of all aspects of biological molecules, biochemical processes and laboratory procedures in the field.
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Chelation usually involves a metal ion (like Ca2+, Fe2+/3+, Mg2+, or even Cu2+), but there is no metal ions involved with DNA and its architecture. It uses pretty much proteins to build its architechure with nucleosomes composed of histones (H2A and H2B, H3, and H4) to form a beads on a string structure. And then the linker histone H1 to form a 30 nm fiber of coiled beads into a rope structure. From there, it can have chromatin modeling protein complexes to make it into heterchromatin (condensed and repressed transcriptionally) or euchromatin (maybe a loose scaffold of DNA and proteins for active transcription).
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