| 21. | Zippers come in many sizes and with varied numbers of clips.
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| 22. | In 1995, Hefty came out with a sliding zipper bag.
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| 23. | It contains an atypical leucine-zipper coiled-coil domain.
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| 24. | Each HSF monomer contains one N-terminal leucine zipper repeats.
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| 25. | It has multiple zinc finger motifs and a leucine zipper motif.
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| 26. | It became the first game to be developed by Zipper Interactive.
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| 27. | In December 2008 there were four Zippers still registered in Canada.
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| 28. | Neural retina-specific leucine zipper proteins belong to this family.
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| 29. | Unlike plastic zippers, metal zippers are stronger and more durable.
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| 30. | Unlike plastic zippers, metal zippers are stronger and more durable.
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