Russell Kightley Media Science Gifts : DNA collection

DNA or deoxyribonucleic acid is very complex molecule that stores genetic information in a sequence of base pairs that span the double helix like the rungs of a twisted ladder. In DNA, there are four different types of base and these link together in a strict fashion: guanine pairs with cytosine and thymine pairs with adenine. Because of this defined one to one linkage, each chain carries the same information but coded in complementary bases. The double helical molecule is about 2.4 nm across (2.4 nanometers or 2.4 x 10-9 meters) and comprises two strands. Each strand is a regular sugar-phosphate-sugar chain with bases projecting from it. The two strands run in opposite directions (referred to as being antiparallel) and each is coiled as a right handed helix. The helix undergoes one complete turn about every ten base pairs (10 bps), which is equivalent to a rise of 3.4 nm up the helical axis (i.e. the helix has a period of 3.4 nm). The unit molecule of DNA is called a nucleotide and consists of a single sugar-phosphate-base unit. These nucleotides are then strung together to make the chains (polynucleotides) that wrap around each other. The genetic information for an entire organism is called the genome. The full sequences of genomes have been studied for several organisms, most famously humans in the human genome project. Genes are the inheritance units in the genome and each gene codes for the production of a particular molecule.

DNA mandala gold DNA viewed down axis with helical coils emphasised in gold: mandala like design.	DNA mandala DNA viewed down long axis creating mandala like design.	All DNA Mugs It's coffee time at the lab. A wide range of striking DNA mugs to brighten any workplace or home.	DNA COILS Luminous double helical molecule. Decorative with no text.	DNA big and bright Add a splash of color with DNA, the molecule that everyone recognises.
DNA skeleton tilted Classic and easily recognised DNA molecule.	DNA bright sepia DNA brightly glowing sepia.	DNA Blues Wear your blue genes on your shirt. Colourful DNA T-shirts and more ..	DNA Bright & White Clean & Classic. DNA molecule on white.	DNA BOLD DNA simplified and abstract. Molecule as Modern Art.
DNA helix Add a splash of color with DNA, the molecule that everyone recognises.	DNA skeleton vertical Open skeletal model showing the helical nature of the molecule.	3D Stereoscopic Images that jump out at you!