I read that

"trp operon is located at 27 min on E.coli chromosome."

What does "min" mean ?


1 Answer 1


Min means minutes. Minutes are counted for interruption points since onset of DNA transfer in F-pili-mediated conjugation. The point "0" is not associated with ori, but is close to thr. The total chromosome size is 100 min (time taken for conjugation).


  • 1
    $\begingroup$ Well.. I am not sure if this 100 minute is for the replication or transfer. I am still confused because this site says it is replication. In fact I did write conjugation first and changed to replication. $\endgroup$
    Apr 1, 2014 at 9:25
  • $\begingroup$ in fact replication is much faster in regular conditions. $\endgroup$
    Apr 1, 2014 at 9:27
  • $\begingroup$ Yes, 100 min is the time required for the transfer, since replication time itself is ca 40 min. $\endgroup$
    – alephreish
    Apr 1, 2014 at 9:47

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