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Archive of SEPGuides (5.1.2017): Models and Model Kits

All models are wrong, but some are useful

The statement used as the title for this this box is attributed to George Box, or sometimes to Edward Deming, both experts on quality control. This page identifies several models useful for helping people understand DNA structure and function.

If you want to learn more about what makes models useful, look at this list of desirable features from Idiagram

http://www.idiagram.com/ideas/models.html

DNA Models - Wooden

Very sturdy wooden dowel DNA model that can be used to demonstrate helical structure, twisting, base pairing, phosphates, sugars, hydrogen bonding, and unzipping.

Model and parts available from the manufacturer:

Henry Kozloski
102 Meadow Street
Agawam, MA 01001
FAX (413) 786-6934

Order by fax, must have PO number.


Model can be ordered from:

Flinn Scientific, Inc.
(800) 452-1261
www.flinnsci.com

You must have a Flinn Customer Number designating you as an educational group or teacher to order.


Model can be ordered from:

Science Kit & Boreal Laboratories
(800) 828-7777
www.ScienceKit.com


Model can be ordered from:

eNasco
(800) 558-9595
www.eNasco.com


3D Molecular Designs

The Center for BioMolecular Modeling at the Milwaukee School of Engineering specializes in creating and producing physical models of molecular structures for research and science edication purposes. They also develop teaching activities to teach molecular structure and function. Visit their site at http://cbm.msoe.edu.

Their models and building materials are available for purchase through 3D Molecular Designs, and learning activities can also be downloded from their site: www.3dmoleculardesigns.com. Some of our favorite products include:

Special toobers with wire inside that allows them to hold folded shapes - useful for modeling molecular structures.
Water molecule models with magnets inside them, allowing the models to mimic the polar nature of water.
A magnetic DNA model that can be built one base-pair at a time, made of sturdy plastic.

DNA Models - Plastic

Plastic DNA model that can be used to demonstrate helical structure, twisting, base pairing, phosphates, sugars, hydrogen bonding, and unzipping. Sturdy and fits in a small box suitable for traveling teachers.

Purchase from Rachel von Roeschlaub at:

SciVon Enterprises
(516) 767-0048
scivonmodels@yahoo.com
www.scivon.com


DNA Models - Molded Plastic

Colleagues recommend Spiring Enterprises 11- or 22-base helix (shown here is the 22.) Molymod Advanced MiniDNA AMDNA-060-22

Available at:

Carolina Biological Supply Co.
(800) 334-5551
www.carolina.com


Available at:

The DNA Store
(719) 448-2654
www.thednastore.com


For bulk orders, contact the manufacturer, Phil Spiring, in England: email@molymod.com

www.molymod.com


Other DNA model ideas

For DNA models, we have also used yarn skeins, heavy duty separating zippers, cassette tapes, blue prints, and a colorful, fold-it-yourself paper model called DNA Origami.

The Becker Bottle

This item should be in Oprah's List of Favorite Things (Teaching Things, anyhow). The blue bottle contains one million small colored beads with different parts per million represented by different colored spheres (for instance, there are 1,000 ppm white, 100 ppm pink, 10 ppm green, and one black bead). The yellow bottle contains 999,999 yellow beads with one black bead.

These models always draw a crowd to see who can find the one black bead in a million.

They can be ordered from Flinn Scientific, www.flinnsci.com. You must have a Flinn Customer Number designating you as an educational group or teacher to order.