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Molecular Biology
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Genetiske transaktioner i bakterier
DNA der repliceres og flytter rundt i den samme celle
° Insertions-sekvenser og transposomer DNA der repliceres og flytter rundt mellem celler ° Transformation - DNA optag, naturlig og ”Gensplejsning” ° Conjugation - autonom plasmidoverførsel og ”Sex” i bakterier ° Transduktion - generel og specialiseret
Fig. 14.7
Modified after Goryshin, I. Y. et al. J. Biol. Chem. 1998;273:7367-7374 Tn5
Fig. 1. A) the features critical for Tn5 transposition include the transposase (Tnp), the inhibitor of transposition (Inh), and the 19-bp end sequences (the outside end, OE, and the inside end, IE). The P3 and P4 proteins are nonfunctional versions of Tnp and Inh. B) hyperactive Tnp mutations used in this study. C) 19 bp outside and inside end sequences.
Fig. 14.19
F’ plasmider er F faktor plasmid med ekstra gener fra værtsorganisme(r)
Example: Multiresistent pathogens often carry the antibiotic resistance genes on conjugative plasmids
Chapt. 13
Examples: Diphtheria toxin genes are carried by a phage in Corynebacterium diphtheriae Scarlet fever (skarlagensfeber) Tox+ genes are carried by a phage in Streptococcus pyogenes
λpproC
Fig. 13.22
Ny hypotese Test Konklusion
Hvordan videnskab virker (første gang formuleret af Ibn al-Haytham som levede i Persien 965 – ca. 1039)
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Zhou et al. 1993