Is there a cheaper alternative to IPTG?

[Tracy Aquilla]

In Article <Pine.SUN.3.90.941206162348.23020A-100000 at condor>,
jpaniagf at CONDOR.DGSCA.UNAM.MX (PANIAGUA SOLIS JORGE FERNANDO) wrote:
>Hello bio.net.ers:
> I am trying to induce moderate quantities (about 5 liter cultures) of an 
>E. coli strain with a plasmid containing a gene controled by the lac 
>promotor. I dont want to finish our next year supply of IPTG and I would 
>like to ask if anyone knows about a cheaper alternative of lac induction. 
>The E. coli starin is DH5 alpha. Thanks very much from a warm Mexican 
>graduate student.   Manuel Carrera, jpaniagf at condor.dgsca.unam.mx

Try lactose.