Orbit AT Nucleotide Assembly

This image shows adenine & thymine paired together with thymine facing "upwards" & adenine facing "downwards". Note the double bonds that are visible only on the thymine side. They are also present on the adenine side but cannot be readily seen.

This is an important feature of the Indigo Instruments 12 base pair DNA model when used as part of a lab instruction exercise. The 2 hydrogen bonds consist of a 5mm long "wobbly" bond with a white insert. Although linear hydrogen atoms are available we believe this representation along with the double bonds shown in the base pairs better illustrates the importance of the overall resonance structure.

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

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 This image shows a completed base pair with adenosine at left and thymidine at right. Note that the "X-pegs" that illustrate the double bonds are on top on one side and on the bottom on the other. This ensures that the strands are built anti-parallel to form the major & minor grooves.


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

P/NDescriptionQTY
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
68795Rod3Rod1
68795WBDNA wooden base for 12 Lyr Kit1
68795JamNutNut4
68795washerWasher4
68795spacerAcrylic tube spacer (Orbit)11