Plasmid Origins

John Cherwonogrodzky jcherwon at
Wed Mar 27 15:35:50 EST 1996

Dear Roeland:
      Your topic on the origins of plasmids is an interesting one. It's 
outside my specialty but I would guess that some of the items might be:
     - devolution of viruses into plasmids
     - evolution of expendable genes into a chromosomal unit
     - folding (if you look on plasmid gels, there's always a 20 kilodalton 
band, I believe this is package units of DNA and would explain viral lysogeny, 
plasmid evolution and basic genetic replication)
     Take care....john

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