Fwd: Phe Auxotrophic E. Coli BL21(DE3)

[jflood]

Hello, I'm looking for a Phe auxotrophic strain of E Coli that can be
used with plasmids with T7 promoter. Preferably BL21 (DE3). Can
anybody direct me to a bank, lab or were to buy it? Thnxs


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