12 Base Pair DNA Model

This 3D DNA model mimics the original Watson Crick version with major/minor grooves, anti-parallel strands & base complementarity. Read our blog on why this is our best DNA Double Helix Teaching Tool.

SKU: 68795WS
Orbit 12 base pair DNA model, needs assembly

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When used as part of a lab exercise, it is highly effective for illustrating the major features of the double helix as well as explaining the basics of DNA forensics identification techniques. 12 base pairs is enough to show 1 full turn & is sufficient to illustrate the nature of unique DNA sequences needed for forensic analysis.

This model has been training molecular biologists since 1997. Among our many customers: U. Toronto, Harvard, MIT, NYU, U. Minnesota, Wayne State, U. Illinois, Caltech, US Naval Academy, Stanford & many more.

TV & movie appearances include the Fantastic Four & Stargate Atlantis!

  • 1 hr. molecular biology lab for 24 students for as little as $0.10/student
  • Can be built & disassembled repeatedly
  • Over 1 million possible combinations
  • Use as stand-alone, display model
  • Stands ~1m (3') tall
  • 1 turn; 12 base pairs; 6 each AT & GC
  • Assembly guide sent by e-mail
  • Base not as shown: 2 unstained wood pieces for "X" base support
  • Major/minor grooves stand out
  • Special double bonds show antiparallel structure
  • Alpha helix fits major groove (not included)


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24 Base Double Height Version, AT, CG, Deoxyribose, GC, GC-AT, Phosphate, TA, TA-CG,

68218CAtom, Orbit, O, red, 1 prong85
68230CAtom, Orbit, O, 110 degree, red125
68235CAtom, Orbit, C, planar:108-120-132, black25
68236CAtom, Orbit, C, planar: 108-126-126, black25
68237CAtom, Orbit, N, planar: 108-126-126, blue30
68241CAtom, Orbit, C, planar: 120-120-120, black75
68242CAtom, Orbit, N, planar: 120-120-120, blue70
68244CAtom, Orbit, C, tetrahedral, black135
68247CAtom, Orbit, P, tetrahedral, purple24
68267CAtom, Orbit, double/triple bond peg/insert211
68186-20Wobbly bond, 20mm, each418
68186-25Wobbly bond, 25mm, each98
68366Orbit bonds, opaque, 20mm, 15/bundle7
67288CBond, Minit, white, 210mm5
68186-50Wobbly bond, 50mm, each30
68795LAYPlastic layer12
68795WBDNA wooden base for 12 Lyr Kit1
68795spacerAcrylic tube spacer (Orbit)11