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Human growth hormone is shown as a ribbon model of its four helix bundle, with coiled spirals packed together and joined by thin connecting loops. Long looping strands trail around the outside of the bundle, making the folded shape easy to follow from every angle. The smooth, organic ribbons give the protein an open, airy look that reads clearly on a desk. A great teaching model for biology classes on proteins, hormones and growth, and an intriguing display piece for students and science fans.

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