λ DNA (cIind 1 ts857 Sam 7) is isolated from a dam+ dcm+ E. coli LE597 lysogen. The DNA is suitable for use as a substrate for generating molecular size standards and for testing restriction endonuclease activity. Restriction endonucleases sensitive to dam or dcm methylation will not cleave this DNA.
Performance and Quality Testing: Purity, DNA structure, and selected restriction endonuclease fragmentation patterns are verified by agarose gel analysis.
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For Research Use Only. Not for use in diagnostic procedures.