Summary
λ red - gam - makes a small plaque on P2 lysogens (the partial Spi- phenotype). It has been proposed that inactivation of an additional gene δ, mapping in the recombination region, makes the plaque bigger (the full Spi- phenotype) (Zissler et al., 1971b). The present paper demonstrates that the Chi mutation in λ (Stahl et al., 1975) confers upon red - gam - phage the full Spi- phenotype and that the deletion of the region of the chromosome attributed to δ does not. It appears unnecessary to invoke a gene δ in the Spi- phenotype.
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Communicated by G. Bertani
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Malone, R.E., Chattoraj, D.K. The role of Chi mutations in the Spi- phenotype of phage λ: Lack of evidence for a gene Delta . Molec. Gen. Genet. 143, 35–41 (1975). https://doi.org/10.1007/BF00269418
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DOI: https://doi.org/10.1007/BF00269418