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Includes 5 mL each of 2 t4rIIA deletion mutant coliphages (items #124529 and #124531) and a T4rIIB deletion mutant (item #124533). These mutants do not revert to the wild. Also includes fresh slants of permissive host E. coli B and restrictive host E. coli K12 (lambda). Can be used in studies of genetic recombination as well as complementation.
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