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|KNX1081: The learning never stops with the education collection! Great for in school as well as at home with friends. Features: -DNA, Replications and Transcription Set. -Education collection. -Molecular basis of heredity. -521 K'Nex rods and connectors. -24 page full color building instruction booklet. -Build 11 DNA and mRNA molecules. -Build any one from 19 combinations at once. -Enzymatic control of DNA processes.|