Three sites recognized by SmaI endonuclease, purified from Serratia marcescens SB, have been located on lambda DNA at 0.406, 0.656, and 0.825 fractional lengths from the left end of the DNA molecule.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC354941PMC
http://dx.doi.org/10.1128/JVI.19.3.1006-1011.1976DOI Listing

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