Abbildung: Identifizierung von Nervenzellen im Bulbus olfactorius des Menschen. Einzelne Zellen werden mit Hilfe von spezifischen Fluoreszenzfarbstoffen markiert. Sämtliche Zellkerne sind in der Abbildung blau eingefärbt. Diese Art der Kennzeichnung erlaubt es, innerhalb weniger Stunden einige Millionen Zellkerne verschiedener Arten einzeln in speziellen Sortiermaschinen zu trennen (Fluorescence-activated cell sorting). Im Anschluss daran kann das Alter einzelner Zellpopulationen durch C-14-Analyse deren DNA bestimmt werden.
Jakob Liebl
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