Cope-LLG Catalogue 2018

162 1. General laboratory consumables General laboratory aids/Documenting GENERAL CATALOGUE EDITION 20 E & OE. Molecular model system miniDNA ® /RNA Kits The advanced miniDNA ® system comprises colour-coded, abstract-shaped parts designed to represent the nitrogenous bases, pentagonal sugar and pyramidal phosphate components needed to make a double-helix model of DNA. The three hydrogen bonds that connect Cytosine to Guanine and the two that connect Thymine to Adenine are represented by the appropriate number of pegs. Two DNA kits are available to make either a 12-layer (1 turn) or 22-layer (2 turns) DNA model. The models can be displayed on their stands, or unzipped into a ladder form to demonstrate the process of Replication. A similar approach can be taken with the two RNA kits to model the process of Protein Synthesis. 3 4 Type Description PK Cat. No. miniDNA ® miniDNA ® RNA Kit RNA Kit 12-layer Kit 22-layer Kit 12-base Kit 24-base Kit 1 1 1 1 6.261 370 6.261 344 6.265 752 6.265 753 3 4 Molecular model system This molecular model system is also suitable for demanding speakers who want to create molecular models during their lesson or in the following discussion. Large and stable "molecules" are constructed completely without tools. The metal valence connectors (50 mm length when plugged) have a spring mechanisms on both sides allowing fast connecting and disconnecting of the "atoms". The spheres are made of polished plastic. As in nature, the "atoms" can rotate freely in the longitudinal axis when plugged. Double and triple bonds, also made of metal, are used to form stable groups that are not solvable. No deflection or wobbling anymore. "Atoms" with different angle holes are available on request. 1 2 Contents Molecular model system large 22 carbon, black, diam. 30 mm 5 fluorine, dark-green, diam. 25 mm 55 hydrogen, white, diam. 20 mm 6 chlorine, lime, diam. 30 mm 11 nitrogen, blue, diam. 30 mm 2 bromine, brown, diam. 35 mm 1 carbonyl group 2 sulphur, yellow, diam. 30 mm 3 ethene groups 1 iodine, purple, diam. 44 mm 1 ethyne group 47 metal connectors 12 oxygen, red, diam. 30 mm 1 highly illustrated manual Contents Molecular model system standard 9 carbon, black, diam. 30 mm 6 oxygen, red, diam. 30 mm 32 hydrogen, white, diam. 20 mm 5 fluorine, dark-green, diam. 25 mm 2 nitrogen, blue, diam. 30 mm 6 chlorine, lime, diam. 30 mm 1 carbonyl group 1 sulphur, yellow, diam. 30 mm 3 ethene groups 36 metal connectors 1 ethyne group 1 highly illustrated manual Type PK Cat. No. Molecular model system large Molecular model system standard 1 1 6.268 958 6.268 959 1 6.268 958 2 6.268 959