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Introducing:  Dr. Jennifer Mann A trefoil-ed strand of DNA appears in the background Dr. Mann explains how knots appear in our DNA Type II topoismoerases undo the crossings in our DNA How many crossings does a knot have?  It depends on how you look at it. Some crossing numbers of different knots The last knot looks sort of like two trefoils glued together Two strands of DNA We're breaking down the building blocks of life

 Dave Jensen - smmg@math.utexas.edu
Department of Math, UT Austin, 1 University Station C1200, Austin, TX 78712
Phone: 512-475-9138 | Fax: 512-471-9038 | Office: RLM 9.144