Introduction to Biophysical Methods for Protein and Nucleic by Jay A. Glasel, Murray P. Deutscher

By Jay A. Glasel, Murray P. Deutscher

The 1st of its sort, Introduction to Biophysical equipment for Protein and Nucleic Acid examine serves as a textual content for the skilled researcher and pupil requiring an creation to the sector. each one bankruptcy provides an outline of the actual foundation of the tactic, the kind of info which may be acquired with the tactic, how facts might be analyzed and interpreted and, the place acceptable, functional pointers on strategies and kit. Key beneficial properties * smooth Use of Mass Spectroscopy * NMR Spectroscopy * Molecular Modeling and pics * Macintosh and DOS/Windows 3.x disks

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Torsion angles are measured in the range - 1 8 0 ~ angle-< + 180 ~ It does not matter whether the system is 16 Jay A. Glasel Fig. 1 Comparison of the sizes and shapes of some soluble proteins drawn to the same scale. The inset shows the sizes of tRNA, of a segment of double-stranded DNA, and of bilayer membranes at the same scale. From Goodsell and Olson (1993). v i e w e d from one end or the other. These relationships are s h o w n in Fig. 2, w h e r e a generic torsion angle, 0, is shown. The three torsion angles, ~b, 6, and oJ, that define the c o n f o r m a t i o n of an a m i n o acid residue in the m a i n chain of a p o l y p e p t i d e are s h o w n in Fig.

This is its high dielectric constant. As in the Debye-H~ickel theory we can generalize the electrostatic (coulombic) force between two charges i and j separated by distance rij in a vacuum as F ~ 1 / Er2j, where E is the dielectric constant of the medium between the charges. The dielectric constant is a dimensionless number. 001 for gases, 2 to 10 for solid insulators such as glass, and from about 87 (0~ to 55 (100~ for liquid water. Thus, the force between two charges is much less in liquid water than when the charges are the same distance apart in a vacuum.

1 Comparison of the sizes and shapes of some soluble proteins drawn to the same scale. The inset shows the sizes of tRNA, of a segment of double-stranded DNA, and of bilayer membranes at the same scale. From Goodsell and Olson (1993). v i e w e d from one end or the other. These relationships are s h o w n in Fig. 2, w h e r e a generic torsion angle, 0, is shown. The three torsion angles, ~b, 6, and oJ, that define the c o n f o r m a t i o n of an a m i n o acid residue in the m a i n chain of a p o l y p e p t i d e are s h o w n in Fig.

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