"Good reasons" that are obviously absent in the environmental conditions of the Lenski experiment. Hence the adaptation.This transporter is only activated under oxygen free conditions with good reason.
Now, once again, please present your argument as to why adaptation should not be a continual and open ended process? The distinction between adaptation and evolution raised by creationists is an artificial one. Evolution is simply adaptation occurring over long periods of time.
Don't tell me...you're a YEC.