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connector links Connector Links The marked superiority of the CPK ® Atomic Models derives largely from Dr. Koltun’s Connector Links. His analysis of the engineering problems involved led him to combine new plastic materials with innovative link designs which satisfy four critical requirements simultaneously: • Hold atoms together with great tenacity. A force of 5 to 7 kg is required to separate them. This force is readily furnished by the levering blade of the SP1 67-7120 Construction Tool, see page P18. • Permit distortions of bond angles to vary up to ±8° with negligible loss in bond strength. • Develop sufficient rotational friction to assure that large, extended side chains, often attached by a single bond, will remain indefinitely in proper steric orientation. • Allow bond distances to be shortened or lengthened. The connectors are made of Texin®, a hard, rubber-like elastomer which is strong but resilient and flexible. Since bond distances and angles for particular atoms are known to vary even in similar structures, two special links, in addition to the standard link, are provided to increase or decrease the normal bond distance by +0.08Å or -0.05Å. A special ‘gluing’ link is also available for permanently connecting atoms at standard bond distances. The various link types are color-coded to aid identification. Order # SP1 67-7013 Order # SP1 67-7047 Order # SP1 67-7039 Connector Link, Short Shortens bond distance by 0.05Å. Blue. Product Connector Link, Short Connector Link, Carbon Provides standard bond distance. Has locking splines at each end placed 180° out of phase that restrict rotation of SP1 67-6577 Carbon, Tetrahedral. Black. Product Connector Link, Carbon Connector Link, Locking Provides standard bond distance and has locking splines that mate with keyways in the female socket of the atoms to prevent rotation. Gray. Product Connector Link, Locking Order # SP1 67-7005 Connector Link, Standard Provides standard bond distance. Off-white. Product Connector Link, Standard Connector Link, Long Order # SP1 67-7054 Connector Link, Gluing For constructing permanent structures at standard bond distance using trichlorethylene ‘glue’ or Testor’s ® Polystyrene Cement. Black. Product Connector Link, Gluing Lengthens bond distance by 0.08Å. Red. Connector Link, Bayonet H-Bond Replacement Order # SP1 67-7021 Product Connector Link, Long This is the connector that is supplied with the SP1 67-6684 H-Bond, Bayonet Type, Hydrogen atom. It is for replacement if the tip of the connector supplied with the atom breaks. Off-white. Order # SP1 67-7062 Product Connector Link, Bayonet H-Bond Replacement 70 www.harvardapparatus.com phone 508.893.8999 • toll free U.S. 800.272.2775 • fax 508.429.5732
accessories Accessories & Tools Order # SP1 67-7096 H-Bond Spacer For use with the SP1 67-6726 Hydrogen H- Bond, Hook Type, see page 64. One or more of these spacers can be put on over the hook of the SP1 67-6726 to increase the bond distance by 0.2Å for each spacer used. White. Screw for Amine Cap This screw is used to connect the SP1 67- 7112 Amine Cap, see page 67, to the SP1 67-6726 Hydrogen H-Bond, Hook Type when the hook is removed. Order # SP1 67-7187 Product H-Bond Spacer Product Amine Cap Screw Metal Atom Connector Link Supplied with self-tapping screw. For use with SP1 67-6999 Metal, All Purpose, see page 69. Note that two of these connectors are supplied with each SP1 67-6999 Metal, All Purpose. White. Order # SP1 67-7161 SP1 67-7229 Product Metal Atom Connector Link Single Metal Atom, No Connector Link Construction Tool To assemble the models, a Connector Link is placed in the well on the end of the handle of this Construction Tool. The Connector Link is then pressed into the female socket of the atom. The second atom is simply pressed onto the first with a slight twist, and the bond is made. To separate the atoms, the blade of the Construction Tool is merely inserted between the atoms to pry them apart. A Connector Link may be completely removed by slipping the forked end of the Construction Tool around the center groove of the link, and the tool is pried upward. Order # SP1 67-7120 Product Construction Tool Angstrom Unit Scale Caliper An Angstrom Unit Scale caliper calibrated at 1.25 cm/Å (the scale of the CPK ® models) which offers a convenient way to make direct measurements in Angstroms on CPK ® structures. Range 0 to 30Å graduated in 0.1Å with each Å numbered. Sturdy bar engraved with black-filled graduations. Accurate measurement is attained by two spring-loaded cursors with long transparent plastic jaws. One cursor is reversible to make internal and external measurements. Overall length 64 cm (25 in). Order # SP1 67-7088 Product Socket Socket Standard female socket to be mounted on special atom species fabricated by the user. This socket takes all of the Connector Links listed on page 70. White. Hydrogen Wrench This wrench is for use with the SP1 67- 6726 Hydrogen H-Bond, Hook Type, see page 64. When the hook of that atom is placed in the slot of the SP1 67-6874 Oxygen, Single Bond or SP1 67-6916 Oxygen, Indented Double Bond atom, this wrench fits over the eight-sided face of the basic hydrogen body, and the body is turned until the hook is brought up securely against the oxygen atom. Order # SP1 67-7146 Order # SP1 67-7179 Product Angstrom Unit Scale Caliper Pamphlet: “Molecules in Three Dimensions” A 20-page pamphlet subtitled A Guide to the Construction of Models of Biochemically Interesting Compounds with CPK ® Models. Written by Robert A. Harte of the American Society for Biochemistry and Molecular Biology. Product Molecules in 3 Dimensions Order # SP1 67-7138 Product Hydrogen Wrench www.harvardapparatus.com phone 508.893.8999 • toll free U.S. 800.272.2775 • fax 508.429.5732 71
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2010/11 molecular Sample Preparatio
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introduction The Sample Preparation
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sample preparation Technology Selec
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Guide to Sample Preparation Product
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Guide to Sample Preparation Product
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sample preparation Sample Prep Pipe
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sample preparation PrepTip Desired
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sample preparation ProTip • Fast
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sample preparation Family of Tipcol
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Page 29 and 30: sample preparation Ultra-Fast DIALY
Page 31 and 32: sample preparation SpinDIALYZER &
Page 33 and 34: sample preparation Flow-Thru DIALYZ
Page 35 and 36: sample preparation Ultra-Micro Disp
Page 37 and 38: sample preparation Fast Macro Dispo
Page 39 and 40: sample preparation Liposome Prepara
Page 41 and 42: sample preparation CoZap CoZap Pads
Page 43 and 44: sample preparation ElectroPrep Sys
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Page 47 and 48: sample preparation Fast Flow-Thru D
Page 49 and 50: Introduction to Equilibrium Dialysi
Page 51 and 52: sample preparation Fast Micro-Equil
Page 53 and 54: sample preparation DispoEquilibrium
Page 55 and 56: CPK ® atomic models Harvard Appara
Page 57 and 58: CPK ® atomic models Guide to CPK
Page 59 and 60: CPK ® sets CPK ® Atomic Model Set
Page 61 and 62: Summary of Unassembled Models, Comp
Page 63 and 64: individual atoms Carbon Atoms (cont
Page 65 and 66: individual atoms Halogen Atoms Halo
Page 67 and 68: individual atoms Nitrogen Atoms (co
Page 69: Phosphorus, Sulfur and Metal Atoms
Page 73 and 74: Research and Teaching Sets (continu
Page 75 and 76: Assembled Nucleic Acid Components n
Page 77 and 78: nucleic acid components Unassembled
Page 79 and 80: Assembled Amino Acid Models individ
Page 81 and 82: assembled models Fully Assembled Mo
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