Biologie fur Mediziner by Prof. Dr. Konrad Bachmann (auth.) PDF

By Prof. Dr. Konrad Bachmann (auth.)

ISBN-10: 3540163786

ISBN-13: 9783540163787

ISBN-10: 3642711197

ISBN-13: 9783642711190

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Phobe CHz-Kette. Durch Bindung einer } Giy",'" Fettsaure an die Aminogruppe und Veresterung der endstandigen HydroxylH-y-H gruppe mit einem hydrophilen Rest erhallOA e oI } Phosphorsaure ten wir Molekiile, die genauso polar hydrophil-hydrophob sind wie die Glycerinphosphatide. Der hydrophile Rest ist Phosphorylcholin bei Sphingomyelinen, } Serin ein Zucker bei Cerebrosiden und eine tooe Kette aus mehreren Zucker-Derivaten bei (Serin -) Kephalin den Gangliosiden. Die Ganglioside kommen besonders in Membranen im Gehim Dieser Alkohol kann Cholin sein (bei Le- vor.

Das ist nicht nur fUr den Forscher befriedigend, sondem auch theoretisch bedeutsam. Mit einigen Prinzipien der Makromolekiilstruktur werden wir am Ende dieser Einfiihrung sehr vertraut sein. Polysaccharide sind Speichermolekiile aus Zuckem, die im Energiestoffwechsel gebraucht werden, oder sie stell en Strukturelemente des Organismus dar. Starke in Pflanzen und Glykogen bei Tieren sind Speicherformen von Glucose. Die Glucosemolekiile sind zwischen den Kohlenstoffatomen 1 und 4 a-glykosidisch verkniipft.

Nm Durchmesser und 280nm Lange bi l det e in Tropo kolla genmol ek iii Tropokollagenmolekiile lagern sich um e in Viertel verschoben nebeneinander an . :·. ~'·. ~·;;t·"r-"¥·I"·t·j· . I:' ru i :~~ ~n ~~~n~ :1; ~H~ :~~lP ~iH~. ~······''I:'··'· ··'·~~w·. flIUi ·~~~HI 'UliJ. ~tJlJ. ; '1 :r .............. 70nm Abb. 07. Aufbau des Kollagens von der Primarsequenz bis zur mikroskopisch sichtbaren Fibrille senverschoben, aber so regelmaBig an, daB man unter dem Elektronenmikroskop eine periodische Streifung an Kollagenfibrillen erkennen kann (Abb.

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Biologie fur Mediziner by Prof. Dr. Konrad Bachmann (auth.)


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