ampicillin analog?

MR ROBERT G CHAPMAN bob_chapman at
Wed Mar 12 20:49:17 EST 1997

We're using an ampicillin based expression system but may be having 
trouble with scale-up due to ampicillin depletion. My boss remembers 
seeing an lactamase resistant analog of ampicillin compatable with 
our AmpR vector. Can anyone provide a refference to such an 

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