von Raycho Yonchev
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| [1.] Ry/Fragment 067 06 - Diskussion Zuletzt bearbeitet: 2016-01-23 14:24:12 WiseWoman | Anézo 2003, Fragment, Gesichtet, Ry, SMWFragment, Schutzlevel sysop, Verschleierung |
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| III.1.1 Membrane system
The chemical structure of DPPC is depicted in Figure 3.1. The lecitin headgroup is a zwitterions, overall neutral, with a positive charge distributed over the choline group and a negative charge on the phosphate group. The biologically relevant enantiomer is R-configurated, the carbon atom GC2 of the glycerol moiety being the chiral center.
Figure 3.1. Structure of DPPC molecule. The membrane system consists of 200 DPPC molecules – each monolayer containing 100 lipid molecules – surrounded by 5820 water molecules. The water to DPPC ratio is [of 29 (water weight fraction 0.42), which corresponds to a fully hydrated state of the bilayer.] |
4.2.1 Membrane system
The membrane system consists of 128 DPPC molecules – each monolayer containing 64 lipid molecules – surrounded by 3726 water molecules. [...] The water to DPPC ratio is of 29.1 (42% water by weight), which corresponds to a fully hydrated state of the bilayer. [...] The chemical structure of DPPC is depicted in Figure 4.1. The lecithin headgroup is a zwitterion, overall neutral, with a positive charge distributed over the choline group and a negative charge on the phosphate group. The biologically relevant enantiomer is R-configurated, the carbon atom GC2 of the glycerol moiety being the chiral center.
Figure 4.1: Chemical structure of DPPC. The stereospecific numbering of the glycerol moiety is indicated. The chiral center is denoted by an asterisk. |
No source is given. |
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