Premodifier: double
Head noun: helix

Same concepts
http://dbpedia.org/resource/Nucleic_acid_double_helix

Broader concepts

labelprovenanceconfidence
bookisap:1975598060.473282
twisted ladderisap:1635352040.446148
shapeisap:3686917510.349042
structureisap:3369400250.325592