Linen fibers look like the strong fibrous strands of the flax plant. This group is isomorphic to the braid group with three strands. This produces overlapping untwisted strands called slivers. The Greek key motif consists of four adjacent antiparallel strands and their linking loops. DNA is made up of a double helix of two complementary strands. Chemical crosslinks consist of covalent bonds between polymer strands. Modular plugs for stranded have prongs that are designed to connect to multiple wire strands. Each cable is made of 27,572 strands of wire. The baleen of baleen whales consists of long, fibrous strands of keratin. The diffraction pattern determined the helical nature of the double helix strands (antiparallel). Within cells, the long strands of DNA form condensed structures called chromosomes. Such anchors typically comprise tendons of high-tensile bundled steel strands or individual threaded bars. It was made from over 20,000 thin strands of muscle tissue. The core consists of iron strands or sheets. Twin helical strands form the DNA backbone.